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Claremont Pomona Clg Weather Records (USC00041779)

Record envelope, standing records and threshold days for Claremont Pomona Clg (USC00041779), California, United States, with 88 years of record.

Key Facts for Claremont Pomona Clg

  • Claremont Pomona Clg (USC00041779) is a weather station in California, United States at 34.10 latitude and -117.72 longitude, 366 m (1,201 ft) above sea level.
  • The station reports from 1893 to 1980, 88 years of record.
  • 1,464 records set at Claremont Pomona Clg still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Claremont Pomona Clg set a daily record high minimum temperature of 9.4 C (48.9 F) on 31 December 1980.

About the Station

  • Location: California, United States, 34.10 latitude, -117.72 longitude.
  • Elevation: 366 m (1,201 ft).
  • Period of record: 1893 to 1980, 88 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Claremont Pomona Clg, with 2026 drawn through them The band shows the record high and record low for each calendar day at Claremont Pomona Clg. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Claremont Pomona Clg. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Claremont Pomona Clg, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan30.6 C (87.1 F)-7.2 C (19.0 F)n/an/a
Feb32.2 C (90.0 F)-6.7 C (19.9 F)n/an/a
Mar36.1 C (97.0 F)-3.9 C (25.0 F)n/an/a
Apr38.3 C (100.9 F)-1.7 C (28.9 F)n/an/a
May41.7 C (107.1 F)0.0 C (32.0 F)n/an/a
Jun45.6 C (114.1 F)-1.1 C (30.0 F)n/an/a
Jul45.6 C (114.1 F)5.6 C (42.1 F)n/an/a
Aug44.4 C (111.9 F)2.2 C (36.0 F)n/an/a
Sep45.0 C (113.0 F)4.4 C (39.9 F)n/an/a
Oct41.7 C (107.1 F)-0.6 C (30.9 F)n/an/a
Nov36.7 C (98.1 F)-4.4 C (24.1 F)n/an/a
Dec32.2 C (90.0 F)-6.1 C (21.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Claremont Pomona Clg by the year they were set 1,464 records at Claremont Pomona Clg still stand. 1926 holds the most, with 41. 02040601893: 91894: 201895: 121896: 211897: 191898: 191899: 321900: 241901: 151902: 311903: 271904: 191905: 101906: 221907: 221908: 191909: 191910: 271911: 211912: 131913: 191914: 151915: 221916: 221917: 221918: 261919: 181920: 121921: 201922: 151923: 171924: 191925: 331926: 411927: 171928: 131929: 201930: 251931: 221932: 141933: 241934: 181935: 131936: 91937: 201938: 111939: 261940: 181941: 91942: 111943: 141944: 141945: 101946: 91947: 151948: 121949: 321950: 201951: 81952: 101953: 171954: 151955: 241956: 81957: 81959: 121960: 21961: 141962: 121963: 201964: 101965: 221966: 81967: 151968: 91969: 101970: 71971: 281972: 201973: 111974: 41975: 121976: 111977: 81978: 121979: 171980: 121893190219111920192919381947195619661975
1,464 records at Claremont Pomona Clg still stand. 1926 holds the most, with 41.
Standing records at Claremont Pomona Clg by the year they were set
Year setStanding records
18939
189420
189512
189621
189719
189819
189932
190024
190115
190231
190327
190419
190510
190622
190722
190819
190919
191027
191121
191213
191319
191415
191522
191622
191722
191826
191918
192012
192120
192215
192317
192419
192533
192641
192717
192813
192920
193025
193122
193214
193324
193418
193513
19369
193720
193811
193926
194018
19419
194211
194314
194414
194510
19469
194715
194812
194932
195020
19518
195210
195317
195415
195524
19568
19578
195912
19602
196114
196212
196320
196410
196522
19668
196715
19689
196910
19707
197128
197220
197311
19744
197512
197611
19778
197812
197917
198012

All-Time Record Progression

4 new records
When Claremont Pomona Clg set new all-time records 4 all-time records were set at Claremont Pomona Clg between 15 July 1925 and 21 January 1937. Each dot is a new record. Record high minimum temperatureRecord low maximum temperatureRecord daily precipitation15 July 1925: Record high minimum temperature 28.3 C (82.9 F)12 December 1932: Record low maximum temperature 3.9 C (39.0 F)1 January 1934: Record daily precipitation 198.6 mm (7.8 in)21 January 1937: Record low maximum temperature 3.3 C (37.9 F)192519301935
4 all-time records were set at Claremont Pomona Clg between 15 July 1925 and 21 January 1937. Each dot is a new record.
When Claremont Pomona Clg set new all-time records
DateKindDetail
1925-07-15Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)
1932-12-12Record low maximum temperatureRecord low maximum temperature 3.9 C (39.0 F)
1934-01-01Record daily precipitationRecord daily precipitation 198.6 mm (7.8 in)
1937-01-21Record low maximum temperatureRecord low maximum temperature 3.3 C (37.9 F)

Wettest Day of Each Month

Jan: 198.6 mm (7.8 in)
Record daily precipitation for each month at Claremont Pomona Clg The wettest day on record for each calendar month at Claremont Pomona Clg. The most was 198.6 mm (7.8 in) on 1 January 1934. 050100150200 Jan: 198.6 mm (7.8 in), 1 January 1934 Jan Feb: 140.5 mm (5.5 in), 21 February 1914 Feb Mar: 145.5 mm (5.7 in), 2 March 1938 Mar Apr: 63.8 mm (2.5 in), 15 April 1903 Apr May: 62.7 mm (2.5 in), 9 May 1977 May Jun: 19.1 mm (0.8 in), 3 June 1925 Jun Jul: 10.7 mm (0.4 in), 29 July 1968 Jul Aug: 18.5 mm (0.7 in), 10 August 1942 Aug Sep: 81.3 mm (3.2 in), 25 September 1939 Sep Oct: 122.7 mm (4.8 in), 27 October 1896 Oct Nov: 113.8 mm (4.5 in), 13 November 1946 Nov Dec: 95.3 mm (3.8 in), 11 December 1943 Dec
The wettest day on record for each calendar month at Claremont Pomona Clg. The most was 198.6 mm (7.8 in) on 1 January 1934.
Record daily precipitation for each month at Claremont Pomona Clg
MonthRecord daily precipitation (mm)Date
Jan198.6 mm (7.8 in)1 January 1934
Feb140.5 mm (5.5 in)21 February 1914
Mar145.5 mm (5.7 in)2 March 1938
Apr63.8 mm (2.5 in)15 April 1903
May62.7 mm (2.5 in)9 May 1977
Jun19.1 mm (0.8 in)3 June 1925
Jul10.7 mm (0.4 in)29 July 1968
Aug18.5 mm (0.7 in)10 August 1942
Sep81.3 mm (3.2 in)25 September 1939
Oct122.7 mm (4.8 in)27 October 1896
Nov113.8 mm (4.5 in)13 November 1946
Dec95.3 mm (3.8 in)11 December 1943

Period of Record Coverage

1893 to 1980
Days with data per year at Claremont Pomona Clg 87 years of record at Claremont Pomona Clg, 1893 to 1980. 10 years have data for under 90 percent of days and are left out of rankings: 1895, 1906, 1907, 1910, 1924, 1926, 1931, 1957 and others. 1893: 330 of 365 days1894: 337 of 365 days1895: 321 of 365 days1896: 366 of 366 days1897: 365 of 365 days1898: 353 of 365 days1899: 350 of 365 days1900: 344 of 365 days1901: 334 of 365 days1902: 356 of 365 days1903: 342 of 365 days1904: 358 of 366 days1905: 344 of 365 days1906: 327 of 365 days1907: 324 of 365 days1908: 357 of 366 days1909: 337 of 365 days1910: 323 of 365 days1911: 341 of 365 days1912: 352 of 366 days1913: 363 of 365 days1914: 361 of 365 days1915: 360 of 365 days1916: 364 of 366 days1917: 363 of 365 days1918: 364 of 365 days1919: 361 of 365 days1920: 366 of 366 days1921: 365 of 365 days1922: 355 of 365 days1923: 365 of 365 days1924: 297 of 366 days1925: 365 of 365 days1926: 301 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 364 of 365 days1930: 365 of 365 days1931: 294 of 365 days1932: 363 of 366 days1933: 365 of 365 days1934: 356 of 365 days1935: 365 of 365 days1936: 357 of 366 days1937: 361 of 365 days1938: 358 of 365 days1939: 344 of 365 days1940: 365 of 366 days1941: 361 of 365 days1942: 353 of 365 days1943: 363 of 365 days1944: 354 of 366 days1945: 362 of 365 days1946: 354 of 365 days1947: 361 of 365 days1948: 349 of 366 days1949: 341 of 365 days1950: 365 of 365 days1951: 363 of 365 days1952: 364 of 366 days1953: 352 of 365 days1954: 362 of 365 days1955: 353 of 365 days1956: 345 of 366 days1957: 323 of 365 days1959: 361 of 365 days1960: 349 of 366 days1961: 360 of 365 days1962: 364 of 365 days1963: 332 of 365 days1964: 345 of 366 days1965: 330 of 365 days1966: 238 of 365 days1967: 361 of 365 days1968: 302 of 366 days1969: 363 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 360 of 366 days1973: 365 of 365 days1974: 364 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 331 of 366 days190519201935195019651980
87 years of record at Claremont Pomona Clg, 1893 to 1980. 10 years have data for under 90 percent of days and are left out of rankings: 1895, 1906, 1907, 1910, 1924, 1926, 1931, 1957 and others.
Days with data per year at Claremont Pomona Clg
YearDays with dataShare of yearComplete
189333090%Yes
189433792%Yes
189532188%No
1896366100%Yes
1897365100%Yes
189835397%Yes
189935096%Yes
190034494%Yes
190133492%Yes
190235698%Yes
190334294%Yes
190435898%Yes
190534494%Yes
190632790%No
190732489%No
190835798%Yes
190933792%Yes
191032388%No
191134193%Yes
191235296%Yes
191336399%Yes
191436199%Yes
191536099%Yes
191636499%Yes
191736399%Yes
1918364100%Yes
191936199%Yes
1920366100%Yes
1921365100%Yes
192235597%Yes
1923365100%Yes
192429781%No
1925365100%Yes
192630182%No
1927365100%Yes
1928366100%Yes
1929364100%Yes
1930365100%Yes
193129481%No
193236399%Yes
1933365100%Yes
193435698%Yes
1935365100%Yes
193635798%Yes
193736199%Yes
193835898%Yes
193934494%Yes
1940365100%Yes
194136199%Yes
194235397%Yes
194336399%Yes
194435497%Yes
194536299%Yes
194635497%Yes
194736199%Yes
194834995%Yes
194934193%Yes
1950365100%Yes
195136399%Yes
195236499%Yes
195335296%Yes
195436299%Yes
195535397%Yes
195634594%Yes
195732388%No
195936199%Yes
196034995%Yes
196136099%Yes
1962364100%Yes
196333291%Yes
196434594%Yes
196533090%Yes
196623865%No
196736199%Yes
196830283%No
196936399%Yes
1970365100%Yes
1971365100%Yes
197236098%Yes
1973365100%Yes
1974364100%Yes
1975365100%Yes
1976365100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
198033190%Yes

Latest Records

20
Latest records at Claremont Pomona Clg
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 1980Claremont Pomona Clg, USdaily high min9.4 C (48.9 F)0.5 C (0.9 F)54 years25 of 100 (Routine)
17 December 1980Claremont Pomona Clg, USdaily high min11.1 C (52.0 F)0.5 C (0.9 F)23 years15 of 100 (Routine)
2 October 1980Claremont Pomona Clg, USdaily high max38.9 C (102.0 F)0.6 C (1.1 F)74 years31 of 100 (Routine)
11 August 1980Claremont Pomona Clg, USdaily high min (Tie)21.1 C (70.0 F)tie15 years3 of 100 (Routine)
2 August 1980Claremont Pomona Clg, USdaily high min (Tie)21.1 C (70.0 F)tie14 years3 of 100 (Routine)
1 August 1980Claremont Pomona Clg, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)21 years15 of 100 (Routine)
29 June 1980Claremont Pomona Clg, USdaily rain0.8 mm (0.03 in)0.8 mm (0.03 in)86 years20 of 100 (Routine)
24 May 1980Claremont Pomona Clg, USdaily low min3.3 C (37.9 F)0.6 C (1.1 F)64 years29 of 100 (Routine)
11 May 1980Claremont Pomona Clg, USdaily low max (Tie)16.1 C (61.0 F)tie23 years3 of 100 (Routine)
24 April 1980Claremont Pomona Clg, USdaily low max12.8 C (55.0 F)2.2 C (4.0 F)58 years29 of 100 (Routine)
23 April 1980Claremont Pomona Clg, USdaily low max (Tie)12.8 C (55.0 F)tie59 years6 of 100 (Routine)
3 March 1980Claremont Pomona Clg, USdaily rain54.1 mm (2.1 in)20.8 mm (0.8 in)2 years19 of 100 (Routine)
27 February 1980Claremont Pomona Clg, USdaily high max (Tie)27.8 C (82.0 F)tie53 years6 of 100 (Routine)
19 February 1980Claremont Pomona Clg, USdaily high min12.8 C (55.0 F)2.8 C (5.0 F)80 years40 of 100 (Notable)
19 February 1980Claremont Pomona Clg, USdaily rain25.9 mm (1.0 in)6.6 mm (0.26 in)82 years35 of 100 (Notable)
18 February 1980Claremont Pomona Clg, USdaily rain67.6 mm (2.7 in)25.2 mm (1.0 in)82 years46 of 100 (Notable)
18 February 1980Claremont Pomona Clg, USdaily high min (Tie)11.7 C (53.1 F)tie12 years2 of 100 (Routine)
17 February 1980Claremont Pomona Clg, USdaily rain94.5 mm (3.7 in)69.9 mm (2.8 in)8 years49 of 100 (Notable)
15 February 1980Claremont Pomona Clg, USdaily high min11.1 C (52.0 F)0.5 C (0.9 F)2 years9 of 100 (Routine)
14 February 1980Claremont Pomona Clg, USdaily rain95.3 mm (3.8 in)24.7 mm (1.0 in)42 years33 of 100 (Routine)

Climate Trend

61 complete years, 1896 to 1979
Annual mean temperature at Claremont Pomona Clg as warming stripes, 1896 to 1979 One stripe for each of 61 complete years at Claremont Pomona Clg, 1896 to 1979. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1902, at 14.8 C (58.6 F), and the warmest was 1934, at 17.9 C (64.2 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1896: 16.2 C, -0.4 C from the station mean1897: 15.4 C, -1.2 C from the station mean1899: 15.3 C, -1.3 C from the station mean1902: 14.8 C, -1.8 C from the station mean1904: 17.9 C, +1.3 C from the station mean1908: 16.7 C, +0.1 C from the station mean1910: 17.5 C, +0.9 C from the station mean1911: 15.9 C, -0.7 C from the station mean1913: 16.4 C, -0.2 C from the station mean1914: 16.4 C, -0.2 C from the station mean1915: 16.1 C, -0.5 C from the station mean1916: 15.7 C, -0.9 C from the station mean1917: 16.1 C, -0.5 C from the station mean1918: 16.2 C, -0.4 C from the station mean1919: 16.4 C, -0.1 C from the station mean1920: 16.0 C, -0.6 C from the station mean1921: 16.6 C, 0.0 C from the station mean1922: 16.3 C, -0.3 C from the station mean1923: 16.7 C, +0.2 C from the station mean1925: 17.7 C, +1.1 C from the station mean1927: 16.2 C, -0.4 C from the station mean1928: 16.9 C, +0.3 C from the station mean1929: 16.9 C, +0.3 C from the station mean1930: 16.6 C, 0.0 C from the station mean1932: 16.0 C, -0.5 C from the station mean1933: 16.2 C, -0.4 C from the station mean1934: 17.9 C, +1.3 C from the station mean1935: 16.6 C, 0.0 C from the station mean1936: 17.5 C, +1.0 C from the station mean1937: 16.7 C, +0.1 C from the station mean1938: 17.0 C, +0.5 C from the station mean1940: 17.0 C, +0.4 C from the station mean1941: 16.2 C, -0.4 C from the station mean1942: 16.3 C, -0.3 C from the station mean1943: 16.9 C, +0.3 C from the station mean1944: 15.7 C, -0.9 C from the station mean1945: 16.4 C, -0.1 C from the station mean1946: 16.8 C, +0.2 C from the station mean1947: 17.2 C, +0.6 C from the station mean1948: 16.1 C, -0.5 C from the station mean1950: 17.0 C, +0.4 C from the station mean1951: 16.6 C, 0.0 C from the station mean1952: 16.5 C, -0.1 C from the station mean1953: 17.0 C, +0.4 C from the station mean1954: 16.9 C, +0.4 C from the station mean1955: 16.7 C, +0.1 C from the station mean1960: 17.5 C, +0.9 C from the station mean1961: 17.3 C, +0.7 C from the station mean1962: 16.7 C, +0.1 C from the station mean1967: 17.1 C, +0.6 C from the station mean1969: 16.8 C, +0.2 C from the station mean1970: 17.0 C, +0.4 C from the station mean1971: 16.3 C, -0.3 C from the station mean1972: 16.7 C, +0.1 C from the station mean1973: 16.2 C, -0.4 C from the station mean1974: 16.6 C, 0.0 C from the station mean1975: 16.0 C, -0.6 C from the station mean1976: 17.2 C, +0.6 C from the station mean1977: 16.9 C, +0.3 C from the station mean1978: 16.8 C, +0.2 C from the station mean1979: 16.6 C, 0.0 C from the station mean189619001910192019301940195019601970
One stripe for each of 61 complete years at Claremont Pomona Clg, 1896 to 1979. Blue stripes are years cooler than the station's own mean of 16.6 C (61.9 F); red stripes are warmer. The coolest year was 1902, at 14.8 C (58.6 F), and the warmest was 1934, at 17.9 C (64.2 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Claremont Pomona Clg as warming stripes, 1896 to 1979
YearAnnual mean temperatureDifference from the station mean
189616.2 C-0.41 C
189715.4 C-1.18 C
189915.3 C-1.25 C
190214.8 C-1.82 C
190417.9 C+1.31 C
190816.7 C+0.08 C
191017.5 C+0.95 C
191115.9 C-0.65 C
191316.4 C-0.17 C
191416.4 C-0.16 C
191516.1 C-0.46 C
191615.7 C-0.88 C
191716.1 C-0.45 C
191816.2 C-0.43 C
191916.4 C-0.14 C
192016.0 C-0.56 C
192116.6 C-0.02 C
192216.3 C-0.31 C
192316.7 C+0.16 C
192517.7 C+1.15 C
192716.2 C-0.41 C
192816.9 C+0.29 C
192916.9 C+0.30 C
193016.6 C+0.01 C
193216.0 C-0.54 C
193316.2 C-0.38 C
193417.9 C+1.33 C
193516.6 C-0.02 C
193617.5 C+0.96 C
193716.7 C+0.14 C
193817.0 C+0.46 C
194017.0 C+0.45 C
194116.2 C-0.40 C
194216.3 C-0.31 C
194316.9 C+0.29 C
194415.7 C-0.91 C
194516.4 C-0.14 C
194616.8 C+0.20 C
194717.2 C+0.65 C
194816.1 C-0.53 C
195017.0 C+0.43 C
195116.6 C-0.01 C
195216.5 C-0.09 C
195317.0 C+0.38 C
195416.9 C+0.36 C
195516.7 C+0.14 C
196017.5 C+0.87 C
196117.3 C+0.68 C
196216.7 C+0.07 C
196717.1 C+0.56 C
196916.8 C+0.20 C
197017.0 C+0.37 C
197116.3 C-0.28 C
197216.7 C+0.14 C
197316.2 C-0.42 C
197416.6 C+0.03 C
197516.0 C-0.57 C
197617.2 C+0.64 C
197716.9 C+0.32 C
197816.8 C+0.23 C
197916.6 C-0.03 C

The annual mean temperature here has risen by 0.08 C (0.02 to 0.14) per decade over 1896 to 1979. In Fahrenheit: 0.14 F (0.03 to 0.26) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Claremont Pomona Clg
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.08 C (0.02 to 0.14) per decade0.14 F (0.03 to 0.26) per decade1896 to 197961Rise
Mean daily maximum-0.12 C (-0.21 to -0.03) per decade-0.22 F (-0.39 to -0.05) per decade1896 to 197961Fall
Mean daily minimum0.3 C (0.2 to 0.4) per decade0.5 F (0.4 to 0.6) per decade1896 to 197961Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1893 to 1980
Yearly extremes at Claremont Pomona Clg: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.6 C (114.1 F)191740.6 C (105.1 F)87
Coldest night (TNn)-7.2 C (19.0 F)1913-2.8 C (27.0 F)87
Wettest day (Rx1day)198.6 mm (7.8 in)193455.9 mm (2.2 in)87
Wettest five days (Rx5day)330.3 mm (13.0 in)198098.5 mm (3.9 in)87
Longest dry spell (CDD)233 days197395 days87

Hottest day (TXx)

Hottest day (TXx) at Claremont Pomona Clg by year The hottest day of the year at Claremont Pomona Clg, 1893 to 1980. The record is 45.6 C (114.1 F) in 1917, marked on the chart; the median year is 40.6 C (105.1 F). 3537.54042.54547.519001920194019601980Record: 45.6 C (114.1 F) in 1917
The hottest day of the year at Claremont Pomona Clg, 1893 to 1980. The record is 45.6 C (114.1 F) in 1917, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Claremont Pomona Clg by year
YearHottest day (TXx)
189337.2 C (99.0 F)
189439.4 C (102.9 F)
189536.1 C (97.0 F)
189640.0 C (104.0 F)
189738.3 C (100.9 F)
189839.4 C (102.9 F)
189936.7 C (98.1 F)
190040.6 C (105.1 F)
190139.4 C (102.9 F)
190241.1 C (106.0 F)
190340.0 C (104.0 F)
190441.7 C (107.1 F)
190542.2 C (108.0 F)
190641.7 C (107.1 F)
190743.3 C (109.9 F)
190842.2 C (108.0 F)
190944.4 C (111.9 F)
191043.3 C (109.9 F)
191141.7 C (107.1 F)
191240.0 C (104.0 F)
191342.8 C (109.0 F)
191437.8 C (100.0 F)
191541.1 C (106.0 F)
191640.0 C (104.0 F)
191745.6 C (114.1 F)
191842.8 C (109.0 F)
191941.1 C (106.0 F)
192040.0 C (104.0 F)
192142.2 C (108.0 F)
192244.4 C (111.9 F)
192340.6 C (105.1 F)
192442.2 C (108.0 F)
192545.6 C (114.1 F)
192638.9 C (102.0 F)
192739.4 C (102.9 F)
192840.0 C (104.0 F)
192943.3 C (109.9 F)
193042.2 C (108.0 F)
193143.9 C (111.0 F)
193242.8 C (109.0 F)
193342.8 C (109.0 F)
193445.0 C (113.0 F)
193543.3 C (109.9 F)
193643.9 C (111.0 F)
193742.2 C (108.0 F)
193843.9 C (111.0 F)
193943.3 C (109.9 F)
194039.4 C (102.9 F)
194137.8 C (100.0 F)
194241.7 C (107.1 F)
194343.9 C (111.0 F)
194442.8 C (109.0 F)
194542.8 C (109.0 F)
194639.4 C (102.9 F)
194741.1 C (106.0 F)
194843.3 C (109.9 F)
194942.8 C (109.0 F)
195041.7 C (107.1 F)
195140.0 C (104.0 F)
195240.6 C (105.1 F)
195340.6 C (105.1 F)
195439.4 C (102.9 F)
195545.0 C (113.0 F)
195640.6 C (105.1 F)
195741.1 C (106.0 F)
195941.1 C (106.0 F)
196040.6 C (105.1 F)
196138.3 C (100.9 F)
196237.8 C (100.0 F)
196341.7 C (107.1 F)
196437.8 C (100.0 F)
196538.3 C (100.9 F)
196636.7 C (98.1 F)
196740.6 C (105.1 F)
196838.9 C (102.0 F)
196940.0 C (104.0 F)
197038.9 C (102.0 F)
197142.2 C (108.0 F)
197238.3 C (100.9 F)
197340.0 C (104.0 F)
197438.3 C (100.9 F)
197537.8 C (100.0 F)
197640.6 C (105.1 F)
197737.8 C (100.0 F)
197838.9 C (102.0 F)
197940.6 C (105.1 F)
198038.9 C (102.0 F)

Coldest night (TNn)

Coldest night (TNn) at Claremont Pomona Clg by year The coldest night of the year at Claremont Pomona Clg, 1893 to 1980. The record is -7.2 C (19.0 F) in 1913, marked on the chart; the median year is -2.8 C (27.0 F). -7.5-5-2.502.519001920194019601980Record: -7.2 C (19.0 F) in 1913
The coldest night of the year at Claremont Pomona Clg, 1893 to 1980. The record is -7.2 C (19.0 F) in 1913, marked on the chart; the median year is -2.8 C (27.0 F).
Coldest night (TNn) at Claremont Pomona Clg by year
YearColdest night (TNn)
1893-1.1 C (30.0 F)
1894-4.4 C (24.1 F)
1895-1.1 C (30.0 F)
1896-2.2 C (28.0 F)
1897-3.9 C (25.0 F)
1898-3.3 C (26.1 F)
1899-6.7 C (19.9 F)
1900-5.0 C (23.0 F)
1901-5.6 C (21.9 F)
1902-3.9 C (25.0 F)
1903-3.3 C (26.1 F)
1904-6.1 C (21.0 F)
1905-2.8 C (27.0 F)
1906-1.7 C (28.9 F)
1907-3.9 C (25.0 F)
1908-4.4 C (24.1 F)
1909-5.0 C (23.0 F)
1910-3.9 C (25.0 F)
1911-6.1 C (21.0 F)
1912-3.9 C (25.0 F)
1913-7.2 C (19.0 F)
1914-4.4 C (24.1 F)
1915-2.8 C (27.0 F)
1916-3.9 C (25.0 F)
1917-3.3 C (26.1 F)
1918-3.3 C (26.1 F)
1919-3.3 C (26.1 F)
1920-2.2 C (28.0 F)
1921-2.2 C (28.0 F)
1922-6.1 C (21.0 F)
1923-2.2 C (28.0 F)
1924-3.9 C (25.0 F)
1925-1.1 C (30.0 F)
1926-1.1 C (30.0 F)
1927-2.8 C (27.0 F)
1928-2.8 C (27.0 F)
1929-4.4 C (24.1 F)
1930-3.3 C (26.1 F)
1931-3.9 C (25.0 F)
1932-3.3 C (26.1 F)
1933-2.8 C (27.0 F)
1934-1.1 C (30.0 F)
1935-3.3 C (26.1 F)
1936-1.7 C (28.9 F)
1937-5.6 C (21.9 F)
1938-2.2 C (28.0 F)
1939-3.9 C (25.0 F)
1940-2.8 C (27.0 F)
1941-2.2 C (28.0 F)
1942-3.9 C (25.0 F)
1943-3.3 C (26.1 F)
1944-1.1 C (30.0 F)
1945-1.7 C (28.9 F)
1946-2.2 C (28.0 F)
1947-2.2 C (28.0 F)
1948-3.3 C (26.1 F)
1949-5.6 C (21.9 F)
1950-3.3 C (26.1 F)
1951-3.3 C (26.1 F)
1952-3.9 C (25.0 F)
1953-1.7 C (28.9 F)
1954-1.7 C (28.9 F)
1955-2.2 C (28.0 F)
1956-2.2 C (28.0 F)
1957-2.8 C (27.0 F)
1959-0.6 C (30.9 F)
1960-3.3 C (26.1 F)
19610.0 C (32.0 F)
1962-0.6 C (30.9 F)
1963-2.8 C (27.0 F)
19640.0 C (32.0 F)
1965-3.3 C (26.1 F)
1966-1.7 C (28.9 F)
1967-3.3 C (26.1 F)
1968-1.1 C (30.0 F)
1969-1.1 C (30.0 F)
19700.0 C (32.0 F)
1971-2.2 C (28.0 F)
1972-1.1 C (30.0 F)
1973-1.1 C (30.0 F)
1974-1.7 C (28.9 F)
1975-1.1 C (30.0 F)
1976-2.2 C (28.0 F)
19770.6 C (33.1 F)
1978-3.3 C (26.1 F)
1979-0.6 C (30.9 F)
19802.2 C (36.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Claremont Pomona Clg by year The wettest day of the year at Claremont Pomona Clg, 1893 to 1980. The record is 198.6 mm (7.8 in) in 1934, marked on the chart; the median year is 55.9 mm (2.2 in). 05010015020019001920194019601980Record: 198.6 mm (7.8 in) in 1934
The wettest day of the year at Claremont Pomona Clg, 1893 to 1980. The record is 198.6 mm (7.8 in) in 1934, marked on the chart; the median year is 55.9 mm (2.2 in).
Wettest day (Rx1day) at Claremont Pomona Clg by year
YearWettest day (Rx1day)
189355.9 mm (2.2 in)
189450.8 mm (2.0 in)
189547.5 mm (1.9 in)
1896122.7 mm (4.8 in)
189749.5 mm (1.9 in)
189835.3 mm (1.4 in)
189928.4 mm (1.1 in)
190089.2 mm (3.5 in)
190152.1 mm (2.1 in)
190231.5 mm (1.2 in)
1903105.9 mm (4.2 in)
190484.6 mm (3.3 in)
190553.3 mm (2.1 in)
190657.4 mm (2.3 in)
190749.0 mm (1.9 in)
190854.1 mm (2.1 in)
190982.6 mm (3.3 in)
191031.2 mm (1.2 in)
191175.7 mm (3.0 in)
191244.2 mm (1.7 in)
191357.2 mm (2.3 in)
1914140.5 mm (5.5 in)
191576.2 mm (3.0 in)
1916118.9 mm (4.7 in)
191722.9 mm (0.9 in)
191854.9 mm (2.2 in)
191937.1 mm (1.5 in)
192039.9 mm (1.6 in)
1921108.7 mm (4.3 in)
192260.2 mm (2.4 in)
192331.2 mm (1.2 in)
192450.8 mm (2.0 in)
192552.1 mm (2.1 in)
192698.0 mm (3.9 in)
1927119.9 mm (4.7 in)
192850.5 mm (2.0 in)
192941.7 mm (1.6 in)
193053.3 mm (2.1 in)
193173.2 mm (2.9 in)
193282.6 mm (3.3 in)
193365.5 mm (2.6 in)
1934198.6 mm (7.8 in)
193539.4 mm (1.6 in)
193649.3 mm (1.9 in)
193797.8 mm (3.9 in)
1938145.5 mm (5.7 in)
193981.3 mm (3.2 in)
194069.1 mm (2.7 in)
194182.0 mm (3.2 in)
194226.9 mm (1.1 in)
1943147.6 mm (5.8 in)
194445.7 mm (1.8 in)
194591.2 mm (3.6 in)
1946113.8 mm (4.5 in)
194736.6 mm (1.4 in)
194832.8 mm (1.3 in)
194949.0 mm (1.9 in)
195050.5 mm (2.0 in)
195180.5 mm (3.2 in)
195296.3 mm (3.8 in)
195319.8 mm (0.8 in)
195481.3 mm (3.2 in)
195534.3 mm (1.4 in)
1956176.5 mm (6.9 in)
195760.5 mm (2.4 in)
195970.6 mm (2.8 in)
196037.6 mm (1.5 in)
196119.1 mm (0.8 in)
196270.4 mm (2.8 in)
196377.5 mm (3.1 in)
196437.8 mm (1.5 in)
196546.5 mm (1.8 in)
196649.8 mm (2.0 in)
196771.1 mm (2.8 in)
196889.9 mm (3.5 in)
196971.9 mm (2.8 in)
197078.7 mm (3.1 in)
197132.0 mm (1.3 in)
197235.1 mm (1.4 in)
197347.0 mm (1.9 in)
197426.4 mm (1.0 in)
197545.7 mm (1.8 in)
197638.6 mm (1.5 in)
197789.2 mm (3.5 in)
1978102.4 mm (4.0 in)
197961.2 mm (2.4 in)
1980138.7 mm (5.5 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Claremont Pomona Clg by year The wettest five days of the year at Claremont Pomona Clg, 1893 to 1980. The record is 330.3 mm (13.0 in) in 1980, marked on the chart; the median year is 98.5 mm (3.9 in). 010020030040019001920194019601980Record: 330.3 mm (13.0 in) in 1980
The wettest five days of the year at Claremont Pomona Clg, 1893 to 1980. The record is 330.3 mm (13.0 in) in 1980, marked on the chart; the median year is 98.5 mm (3.9 in).
Wettest five days (Rx5day) at Claremont Pomona Clg by year
YearWettest five days (Rx5day)
189381.0 mm (3.2 in)
1894104.5 mm (4.1 in)
1895124.3 mm (4.9 in)
1896124.5 mm (4.9 in)
1897102.8 mm (4.0 in)
189843.5 mm (1.7 in)
189952.4 mm (2.1 in)
1900177.9 mm (7.0 in)
190197.3 mm (3.8 in)
190256.4 mm (2.2 in)
190372.4 mm (2.9 in)
1904104.7 mm (4.1 in)
1905121.5 mm (4.8 in)
190688.7 mm (3.5 in)
1907131.4 mm (5.2 in)
1908124.8 mm (4.9 in)
190961.7 mm (2.4 in)
1910134.8 mm (5.3 in)
1911117.3 mm (4.6 in)
191294.5 mm (3.7 in)
1913143.8 mm (5.7 in)
1914276.1 mm (10.9 in)
1915146.1 mm (5.8 in)
1916264.2 mm (10.4 in)
191773.4 mm (2.9 in)
191883.6 mm (3.3 in)
191964.0 mm (2.5 in)
192088.7 mm (3.5 in)
1921199.2 mm (7.8 in)
192297.3 mm (3.8 in)
192337.8 mm (1.5 in)
192482.6 mm (3.3 in)
192552.1 mm (2.1 in)
192698.0 mm (3.9 in)
1927273.1 mm (10.8 in)
192859.4 mm (2.3 in)
192952.1 mm (2.1 in)
193098.5 mm (3.9 in)
1931111.0 mm (4.4 in)
1932113.1 mm (4.5 in)
1933126.4 mm (5.0 in)
1934239.5 mm (9.4 in)
193560.7 mm (2.4 in)
1936136.7 mm (5.4 in)
193797.1 mm (3.8 in)
1938253.8 mm (10.0 in)
1939124.3 mm (4.9 in)
1940113.3 mm (4.5 in)
1941135.3 mm (5.3 in)
194251.5 mm (2.0 in)
1943275.6 mm (10.9 in)
1944134.3 mm (5.3 in)
1945174.5 mm (6.9 in)
1946132.1 mm (5.2 in)
194752.1 mm (2.1 in)
194853.3 mm (2.1 in)
194998.5 mm (3.9 in)
195063.2 mm (2.5 in)
1951128.2 mm (5.0 in)
1952131.1 mm (5.2 in)
195324.2 mm (1.0 in)
1954113.3 mm (4.5 in)
195571.6 mm (2.8 in)
1956226.6 mm (8.9 in)
1957124.8 mm (4.9 in)
195970.6 mm (2.8 in)
196057.9 mm (2.3 in)
196119.1 mm (0.8 in)
196270.4 mm (2.8 in)
1963101.7 mm (4.0 in)
196463.8 mm (2.5 in)
196592.9 mm (3.7 in)
196655.9 mm (2.2 in)
1967130.3 mm (5.1 in)
196891.2 mm (3.6 in)
1969172.5 mm (6.8 in)
1970158.7 mm (6.2 in)
197160.2 mm (2.4 in)
197261.6 mm (2.4 in)
197381.8 mm (3.2 in)
197427.9 mm (1.1 in)
197550.3 mm (2.0 in)
197648.5 mm (1.9 in)
1977141.2 mm (5.6 in)
1978264.5 mm (10.4 in)
1979106.1 mm (4.2 in)
1980330.3 mm (13.0 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Claremont Pomona Clg by year The longest dry spell of the year at Claremont Pomona Clg, 1893 to 1980. The record is 233 days in 1973, marked on the chart; the median year is 95 days. 010020030019001920194019601980Record: 233 days in 1973
The longest dry spell of the year at Claremont Pomona Clg, 1893 to 1980. The record is 233 days in 1973, marked on the chart; the median year is 95 days.
Longest dry spell (CDD) at Claremont Pomona Clg by year
YearLongest dry spell (CDD)
189368 days
189434 days
189543 days
1896103 days
189791 days
189873 days
189939 days
190051 days
190159 days
1902111 days
1903164 days
190471 days
1905127 days
190694 days
190749 days
190889 days
190936 days
1910110 days
191190 days
1912143 days
191341 days
191453 days
191541 days
191660 days
191737 days
191855 days
191939 days
192039 days
192138 days
192287 days
192329 days
192437 days
192532 days
1926148 days
1927112 days
1928156 days
1929104 days
1930146 days
193142 days
1932127 days
1933147 days
1934100 days
193562 days
193693 days
1937123 days
193880 days
1939119 days
194095 days
1941134 days
1942103 days
1943184 days
1944129 days
194577 days
1946131 days
194772 days
1948136 days
1949140 days
1950162 days
1951116 days
195289 days
195381 days
1954196 days
1955166 days
195675 days
195751 days
1959184 days
1960158 days
1961199 days
1962111 days
1963130 days
1964131 days
196559 days
1966130 days
1967105 days
196844 days
1969102 days
1970212 days
1971129 days
1972108 days
1973233 days
1974144 days
1975110 days
197684 days
197784 days
1978132 days
197994 days
198077 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

49 years with a frost

Across 49 years with a frost, the median last spring frost at Claremont Pomona Clg falls on 12 March and the median first autumn frost on 4 December, which leaves a median of 270 days between them.

Fitted over all years, the growing season changes by +6.8 days per decade at this station.

Frost dates and growing season at Claremont Pomona Clg
MeasureMedian, all yearsEarliest periodRecent period (1929 to 1979)Recent against earliestFitted trend
Last spring frost12 Marchn/a11 Marchn/a-5.4 days per decade
First autumn frost4 Decembern/a6 Decembern/a+1.4 days per decade
Growing days270 daysn/a272 daysn/a+6.8 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

53 years, 1898 to 1980

A day with at least 58.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 217.7 mm (8.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Claremont Pomona Clg: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.5 mm (2.3 in)
5 years91.4 mm (3.6 in)
10 years116.6 mm (4.6 in)
25 years153.0 mm (6.0 in)
50 years183.7 mm (7.2 in)
100 years217.7 mm (8.6 in)Longer than the 53 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 53 years of values from 1898 to 1980.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 198.6 mm (7.8 in) in 1934; 176.5 mm (6.9 in) in 1956; 147.6 mm (5.8 in) in 1943.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

  • Data for Claremont Pomona Clg standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Claremont Pomona Clg threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).