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Maricopa 9 SSW Weather Records (USC00025274)

Record envelope, standing records and threshold days for Maricopa 9 SSW (USC00025274), Arizona, United States, with 61 years of record.

Key Facts for Maricopa 9 SSW

  • Maricopa 9 SSW (USC00025274) is a weather station in Arizona, United States at 32.92 latitude and -112.10 longitude, 427 m (1,401 ft) above sea level.
  • The station reports from 1898 to 1958, 61 years of record.
  • 1,464 records set at Maricopa 9 SSW still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Maricopa 9 SSW tied a daily record high maximum temperature of 27.8 C (82.0 F) on 4 December 1958.

About the Station

  • Location: Arizona, United States, 32.92 latitude, -112.10 longitude.
  • Elevation: 427 m (1,401 ft).
  • Period of record: 1898 to 1958, 61 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 Maricopa 9 SSW, with 2026 drawn through them The band shows the record high and record low for each calendar day at Maricopa 9 SSW. 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 Maricopa 9 SSW. 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 Maricopa 9 SSW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan32.8 C (91.0 F)-13.3 C (8.1 F)n/an/a
Feb32.2 C (90.0 F)-8.9 C (16.0 F)n/an/a
Mar36.7 C (98.1 F)-4.4 C (24.1 F)n/an/a
Apr40.0 C (104.0 F)-1.1 C (30.0 F)n/an/a
May45.6 C (114.1 F)2.2 C (36.0 F)n/an/a
Jun48.9 C (120.0 F)3.9 C (39.0 F)n/an/a
Jul50.0 C (122.0 F)8.9 C (48.0 F)n/an/a
Aug48.3 C (118.9 F)10.6 C (51.1 F)n/an/a
Sep48.9 C (120.0 F)4.4 C (39.9 F)n/an/a
Oct43.3 C (109.9 F)-1.7 C (28.9 F)n/an/a
Nov37.2 C (99.0 F)-7.2 C (19.0 F)n/an/a
Dec31.1 C (88.0 F)-8.3 C (17.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Maricopa 9 SSW by the year they were set 1,464 records at Maricopa 9 SSW still stand. 1922 holds the most, with 56. 02040601902: 21903: 311904: 201905: 421906: 291907: 451908: 501911: 111912: 431913: 381914: 281915: 351916: 321917: 221918: 331919: 221920: 321921: 381922: 561923: 401924: 311925: 461926: 221927: 381928: 251929: 241930: 371931: 311932: 251933: 321934: 361935: 241936: 381937: 231938: 311939: 261940: 161941: 121942: 201943: 141944: 91945: 161946: 201947: 191948: 361949: 421950: 461951: 151952: 71953: 41955: 171956: 111957: 71958: 15190219081916192219281934194019461952
1,464 records at Maricopa 9 SSW still stand. 1922 holds the most, with 56.
Standing records at Maricopa 9 SSW by the year they were set
Year setStanding records
19022
190331
190420
190542
190629
190745
190850
191111
191243
191338
191428
191535
191632
191722
191833
191922
192032
192138
192256
192340
192431
192546
192622
192738
192825
192924
193037
193131
193225
193332
193436
193524
193638
193723
193831
193926
194016
194112
194220
194314
19449
194516
194620
194719
194836
194942
195046
195115
19527
19534
195517
195611
19577
195815

All-Time Record Progression

2 new records
When Maricopa 9 SSW set new all-time records 2 all-time records were set at Maricopa 9 SSW between 21 January 1937 and 21 January 1937. Each dot is a new record. Record daily snowfallRecord snow depth21 January 1937: Record daily snowfall 7.6 cm (3.0 in)21 January 1937: Record snow depth 7.6 cm (3.0 in)
2 all-time records were set at Maricopa 9 SSW between 21 January 1937 and 21 January 1937. Each dot is a new record.
When Maricopa 9 SSW set new all-time records
DateKindDetail
1937-01-21Record daily snowfallRecord daily snowfall 7.6 cm (3.0 in)
1937-01-21Record snow depthRecord snow depth 7.6 cm (3.0 in)

Wettest Day of Each Month

Jul: 85.1 mm (3.4 in)
Record daily precipitation for each month at Maricopa 9 SSW The wettest day on record for each calendar month at Maricopa 9 SSW. The most was 85.1 mm (3.4 in) on 29 July 1917. 0255075100 Jan: 43.2 mm (1.7 in), 30 January 1951 Jan Feb: 31.2 mm (1.2 in), 11 February 1927 Feb Mar: 33.0 mm (1.3 in), 28 March 1926 Mar Apr: 30.5 mm (1.2 in), 12 April 1941 Apr May: 18.3 mm (0.7 in), 1 May 1941 May Jun: 22.1 mm (0.9 in), 24 June 1899 Jun Jul: 85.1 mm (3.4 in), 29 July 1917 Jul Aug: 71.1 mm (2.8 in), 1 August 1919 Aug Sep: 79.2 mm (3.1 in), 7 September 1926 Sep Oct: 38.1 mm (1.5 in), 3 October 1914 Oct Nov: 39.4 mm (1.6 in), 29 November 1921 Nov Dec: 45.7 mm (1.8 in), 31 December 1915 Dec
The wettest day on record for each calendar month at Maricopa 9 SSW. The most was 85.1 mm (3.4 in) on 29 July 1917.
Record daily precipitation for each month at Maricopa 9 SSW
MonthRecord daily precipitation (mm)Date
Jan43.2 mm (1.7 in)30 January 1951
Feb31.2 mm (1.2 in)11 February 1927
Mar33.0 mm (1.3 in)28 March 1926
Apr30.5 mm (1.2 in)12 April 1941
May18.3 mm (0.7 in)1 May 1941
Jun22.1 mm (0.9 in)24 June 1899
Jul85.1 mm (3.4 in)29 July 1917
Aug71.1 mm (2.8 in)1 August 1919
Sep79.2 mm (3.1 in)7 September 1926
Oct38.1 mm (1.5 in)3 October 1914
Nov39.4 mm (1.6 in)29 November 1921
Dec45.7 mm (1.8 in)31 December 1915

Period of Record Coverage

1902 to 1958
Days with data per year at Maricopa 9 SSW 54 years of record at Maricopa 9 SSW, 1902 to 1958. 17 years have data for under 90 percent of days and are left out of rankings: 1902, 1908, 1911, 1914, 1934, 1939, 1940, 1942 and others. 1902: 29 of 365 days1903: 364 of 365 days1904: 364 of 366 days1905: 364 of 365 days1906: 365 of 365 days1907: 364 of 365 days1908: 207 of 366 days1911: 183 of 365 days1912: 357 of 366 days1913: 365 of 365 days1914: 322 of 365 days1915: 358 of 365 days1916: 364 of 366 days1917: 363 of 365 days1918: 335 of 365 days1919: 365 of 365 days1920: 364 of 366 days1921: 354 of 365 days1922: 349 of 365 days1923: 360 of 365 days1924: 330 of 366 days1925: 363 of 365 days1926: 348 of 365 days1927: 347 of 365 days1928: 355 of 366 days1929: 363 of 365 days1930: 334 of 365 days1931: 329 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 310 of 365 days1935: 359 of 365 days1936: 344 of 366 days1937: 363 of 365 days1938: 352 of 365 days1939: 304 of 365 days1940: 319 of 366 days1941: 363 of 365 days1942: 328 of 365 days1943: 299 of 365 days1944: 214 of 366 days1945: 360 of 365 days1946: 329 of 365 days1947: 349 of 365 days1948: 365 of 366 days1949: 364 of 365 days1950: 342 of 365 days1951: 301 of 365 days1952: 142 of 366 days1953: 42 of 365 days1955: 242 of 365 days1956: 164 of 366 days1957: 175 of 365 days1958: 296 of 365 days1920193019401950
54 years of record at Maricopa 9 SSW, 1902 to 1958. 17 years have data for under 90 percent of days and are left out of rankings: 1902, 1908, 1911, 1914, 1934, 1939, 1940, 1942 and others.
Days with data per year at Maricopa 9 SSW
YearDays with dataShare of yearComplete
1902298%No
1903364100%Yes
190436499%Yes
1905364100%Yes
1906365100%Yes
1907364100%Yes
190820757%No
191118350%No
191235798%Yes
1913365100%Yes
191432288%No
191535898%Yes
191636499%Yes
191736399%Yes
191833592%Yes
1919365100%Yes
192036499%Yes
192135497%Yes
192234996%Yes
192336099%Yes
192433090%Yes
192536399%Yes
192634895%Yes
192734795%Yes
192835597%Yes
192936399%Yes
193033492%Yes
193132990%Yes
1932366100%Yes
1933365100%Yes
193431085%No
193535998%Yes
193634494%Yes
193736399%Yes
193835296%Yes
193930483%No
194031987%No
194136399%Yes
194232890%No
194329982%No
194421458%No
194536099%Yes
194632990%Yes
194734996%Yes
1948365100%Yes
1949364100%Yes
195034294%Yes
195130182%No
195214239%No
19534212%No
195524266%No
195616445%No
195717548%No
195829681%No

Latest Records

20
Latest records at Maricopa 9 SSW
DateStationRecordValueBeat old record byOld record stoodSignificance
4 December 1958Maricopa 9 SSW, USdaily high max (Tie)27.8 C (82.0 F)tie32 years3 of 100 (Routine)
17 November 1958Maricopa 9 SSW, USdaily low min-5.6 C (21.9 F)1.2 C (2.2 F)20 years13 of 100 (Routine)
17 November 1958Maricopa 9 SSW, USdaily low max (Tie)15.0 C (59.0 F)tie27 years3 of 100 (Routine)
16 November 1958Maricopa 9 SSW, USdaily low max15.0 C (59.0 F)2.2 C (4.0 F)11 years12 of 100 (Routine)
16 November 1958Maricopa 9 SSW, USdaily low min (Tie)-2.8 C (27.0 F)tie9 years1 of 100 (Routine)
21 October 1958Maricopa 9 SSW, USdaily high min (Tie)15.6 C (60.1 F)tie44 years4 of 100 (Routine)
14 October 1958Maricopa 9 SSW, USdaily high min (Tie)18.3 C (64.9 F)tie17 years2 of 100 (Routine)
11 October 1958Maricopa 9 SSW, USdaily high min19.4 C (66.9 F)1.1 C (2.0 F)12 years10 of 100 (Routine)
9 October 1958Maricopa 9 SSW, USdaily high min20.0 C (68.0 F)1.1 C (2.0 F)12 years10 of 100 (Routine)
10 August 1958Maricopa 9 SSW, USdaily high min28.9 C (84.0 F)1.1 C (2.0 F)33 years18 of 100 (Routine)
29 July 1958Maricopa 9 SSW, USdaily low max32.8 C (91.0 F)2.2 C (4.0 F)40 years23 of 100 (Routine)
21 June 1958Maricopa 9 SSW, USdaily rain1.3 mm (0.05 in)0.8 mm (0.03 in)36 years17 of 100 (Routine)
19 June 1958Maricopa 9 SSW, USdaily high min28.3 C (82.9 F)0.5 C (0.9 F)47 years20 of 100 (Routine)
18 June 1958Maricopa 9 SSW, USdaily high min (Tie)27.2 C (81.0 F)tie44 years4 of 100 (Routine)
17 June 1958Maricopa 9 SSW, USdaily high min25.0 C (77.0 F)0.6 C (1.1 F)44 years19 of 100 (Routine)
30 May 1958Maricopa 9 SSW, USmonthly high min27.8 C (82.0 F)1.1 C (2.0 F)24 years24 of 100 (Routine)
29 May 1958Maricopa 9 SSW, USdaily high min22.8 C (73.0 F)1.7 C (3.1 F)33 years19 of 100 (Routine)
29 May 1958Maricopa 9 SSW, USdaily high max (Tie)43.3 C (109.9 F)tie45 years4 of 100 (Routine)
28 May 1958Maricopa 9 SSW, USdaily high max43.3 C (109.9 F)1.6 C (2.9 F)36 years18 of 100 (Routine)
28 May 1958Maricopa 9 SSW, USdaily high min24.4 C (75.9 F)1.6 C (2.9 F)20 years15 of 100 (Routine)

Climate Trend

28 complete years, 1903 to 1950
Annual mean temperature at Maricopa 9 SSW as warming stripes, 1903 to 1950 One stripe for each of 28 complete years at Maricopa 9 SSW, 1903 to 1950. Blue stripes are years cooler than the station's own mean of 20.5 C (68.8 F); red stripes are warmer. The coolest year was 1941, at 19.5 C (67.0 F), and the warmest was 1925, at 21.1 C (70.0 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1903: 20.2 C, -0.3 C from the station mean1904: 20.5 C, 0.0 C from the station mean1905: 21.0 C, +0.6 C from the station mean1906: 21.0 C, +0.6 C from the station mean1907: 20.8 C, +0.3 C from the station mean1912: 20.4 C, -0.1 C from the station mean1913: 20.2 C, -0.3 C from the station mean1915: 20.7 C, +0.2 C from the station mean1916: 20.9 C, +0.5 C from the station mean1917: 21.0 C, +0.6 C from the station mean1919: 20.3 C, -0.2 C from the station mean1920: 19.8 C, -0.7 C from the station mean1921: 20.6 C, +0.1 C from the station mean1922: 20.1 C, -0.4 C from the station mean1923: 20.2 C, -0.2 C from the station mean1925: 21.1 C, +0.7 C from the station mean1928: 21.0 C, +0.5 C from the station mean1929: 20.1 C, -0.4 C from the station mean1932: 20.4 C, -0.1 C from the station mean1933: 20.6 C, +0.1 C from the station mean1935: 20.5 C, +0.1 C from the station mean1937: 21.1 C, +0.6 C from the station mean1938: 21.1 C, +0.6 C from the station mean1941: 19.5 C, -1.0 C from the station mean1945: 20.3 C, -0.2 C from the station mean1948: 19.7 C, -0.8 C from the station mean1949: 19.7 C, -0.8 C from the station mean1950: 20.5 C, 0.0 C from the station mean1903191019151920192519301935194019451950
One stripe for each of 28 complete years at Maricopa 9 SSW, 1903 to 1950. Blue stripes are years cooler than the station's own mean of 20.5 C (68.8 F); red stripes are warmer. The coolest year was 1941, at 19.5 C (67.0 F), and the warmest was 1925, at 21.1 C (70.0 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Maricopa 9 SSW as warming stripes, 1903 to 1950
YearAnnual mean temperatureDifference from the station mean
190320.2 C-0.26 C
190420.5 C-0.01 C
190521.0 C+0.56 C
190621.0 C+0.55 C
190720.8 C+0.34 C
191220.4 C-0.07 C
191320.2 C-0.30 C
191520.7 C+0.22 C
191620.9 C+0.47 C
191721.0 C+0.55 C
191920.3 C-0.21 C
192019.8 C-0.69 C
192120.6 C+0.13 C
192220.1 C-0.37 C
192320.2 C-0.25 C
192521.1 C+0.65 C
192821.0 C+0.49 C
192920.1 C-0.42 C
193220.4 C-0.12 C
193320.6 C+0.11 C
193520.5 C+0.05 C
193721.1 C+0.60 C
193821.1 C+0.64 C
194119.5 C-1.00 C
194520.3 C-0.18 C
194819.7 C-0.77 C
194919.7 C-0.81 C
195020.5 C+0.01 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1898 to 1958
Yearly extremes at Maricopa 9 SSW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)50.0 C (122.0 F)190546.7 C (116.1 F)54
Coldest night (TNn)-13.3 C (8.1 F)1913-6.7 C (19.9 F)54
Wettest day (Rx1day)85.1 mm (3.4 in)191729.1 mm (1.1 in)58
Wettest five days (Rx5day)106.7 mm (4.2 in)194643.7 mm (1.7 in)58
Longest dry spell (CDD)159 days190176 days58

Hottest day (TXx)

Hottest day (TXx) at Maricopa 9 SSW by year The hottest day of the year at Maricopa 9 SSW, 1898 to 1958. The record is 50.0 C (122.0 F) in 1905, marked on the chart; the median year is 46.7 C (116.1 F). 20304050190019101920193019401950Record: 50.0 C (122.0 F) in 1905
The hottest day of the year at Maricopa 9 SSW, 1898 to 1958. The record is 50.0 C (122.0 F) in 1905, marked on the chart; the median year is 46.7 C (116.1 F).
Hottest day (TXx) at Maricopa 9 SSW by year
YearHottest day (TXx)
1898n/a
1899n/a
1900n/a
1901n/a
190222.8 C (73.0 F)
190345.0 C (113.0 F)
190445.0 C (113.0 F)
190550.0 C (122.0 F)
190646.1 C (115.0 F)
190750.0 C (122.0 F)
190846.1 C (115.0 F)
191145.6 C (114.1 F)
191247.8 C (118.0 F)
191346.7 C (116.1 F)
191446.7 C (116.1 F)
191547.2 C (117.0 F)
191647.2 C (117.0 F)
191746.7 C (116.1 F)
191847.8 C (118.0 F)
191946.7 C (116.1 F)
192046.7 C (116.1 F)
192146.7 C (116.1 F)
192248.3 C (118.9 F)
192346.1 C (115.0 F)
192447.8 C (118.0 F)
192548.9 C (120.0 F)
192648.9 C (120.0 F)
192746.7 C (116.1 F)
192846.1 C (115.0 F)
192948.3 C (118.9 F)
193048.3 C (118.9 F)
193146.1 C (115.0 F)
193246.1 C (115.0 F)
193347.8 C (118.0 F)
193448.3 C (118.9 F)
193546.1 C (115.0 F)
193647.8 C (118.0 F)
193748.3 C (118.9 F)
193847.2 C (117.0 F)
193948.9 C (120.0 F)
194046.1 C (115.0 F)
194144.4 C (111.9 F)
194247.2 C (117.0 F)
194346.1 C (115.0 F)
194437.2 C (99.0 F)
194545.6 C (114.1 F)
194646.7 C (116.1 F)
194747.2 C (117.0 F)
194845.6 C (114.1 F)
194945.6 C (114.1 F)
195048.9 C (120.0 F)
195145.0 C (113.0 F)
195246.1 C (115.0 F)
195335.0 C (95.0 F)
195545.0 C (113.0 F)
195642.2 C (108.0 F)
195744.4 C (111.9 F)
195845.0 C (113.0 F)

Coldest night (TNn)

Coldest night (TNn) at Maricopa 9 SSW by year The coldest night of the year at Maricopa 9 SSW, 1898 to 1958. The record is -13.3 C (8.1 F) in 1913, marked on the chart; the median year is -6.7 C (19.9 F). -15-10-50190019101920193019401950Record: -13.3 C (8.1 F) in 1913
The coldest night of the year at Maricopa 9 SSW, 1898 to 1958. The record is -13.3 C (8.1 F) in 1913, marked on the chart; the median year is -6.7 C (19.9 F).
Coldest night (TNn) at Maricopa 9 SSW by year
YearColdest night (TNn)
1898n/a
1899n/a
1900n/a
1901n/a
1902-2.8 C (27.0 F)
1903-5.0 C (23.0 F)
1904-8.3 C (17.1 F)
1905-5.6 C (21.9 F)
1906-5.6 C (21.9 F)
1907-5.0 C (23.0 F)
1908-3.3 C (26.1 F)
1911-7.2 C (19.0 F)
1912-6.7 C (19.9 F)
1913-13.3 C (8.1 F)
1914-4.4 C (24.1 F)
1915-6.7 C (19.9 F)
1916-7.8 C (18.0 F)
1917-5.6 C (21.9 F)
1918-5.6 C (21.9 F)
1919-6.1 C (21.0 F)
1920-5.6 C (21.9 F)
1921-6.7 C (19.9 F)
1922-6.7 C (19.9 F)
1923-5.6 C (21.9 F)
1924-5.0 C (23.0 F)
1925-7.2 C (19.0 F)
1926-4.4 C (24.1 F)
1927-3.3 C (26.1 F)
1928-6.1 C (21.0 F)
1929-6.7 C (19.9 F)
1930-7.2 C (19.0 F)
1931-7.2 C (19.0 F)
1932-7.8 C (18.0 F)
1933-6.7 C (19.9 F)
1934-7.8 C (18.0 F)
1935-5.6 C (21.9 F)
1936-6.7 C (19.9 F)
1937-10.6 C (12.9 F)
1938-7.2 C (19.0 F)
1939-8.3 C (17.1 F)
1940-3.3 C (26.1 F)
1941-5.6 C (21.9 F)
1942-5.6 C (21.9 F)
1943-7.2 C (19.0 F)
1944-6.7 C (19.9 F)
1945-7.8 C (18.0 F)
1946-7.8 C (18.0 F)
1947-7.2 C (19.0 F)
1948-11.1 C (12.0 F)
1949-11.7 C (10.9 F)
1950-13.3 C (8.1 F)
1951-7.2 C (19.0 F)
1952-7.2 C (19.0 F)
1953-6.1 C (21.0 F)
1955-2.2 C (28.0 F)
1956-5.6 C (21.9 F)
1957-2.8 C (27.0 F)
1958-5.6 C (21.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Maricopa 9 SSW by year The wettest day of the year at Maricopa 9 SSW, 1898 to 1958. The record is 85.1 mm (3.4 in) in 1917, marked on the chart; the median year is 29.1 mm (1.1 in). 0255075100190019101920193019401950Record: 85.1 mm (3.4 in) in 1917
The wettest day of the year at Maricopa 9 SSW, 1898 to 1958. The record is 85.1 mm (3.4 in) in 1917, marked on the chart; the median year is 29.1 mm (1.1 in).
Wettest day (Rx1day) at Maricopa 9 SSW by year
YearWettest day (Rx1day)
189839.6 mm (1.6 in)
189922.1 mm (0.9 in)
19006.4 mm (0.25 in)
190138.1 mm (1.5 in)
190227.9 mm (1.1 in)
190339.4 mm (1.6 in)
190417.8 mm (0.7 in)
190522.9 mm (0.9 in)
190638.1 mm (1.5 in)
190716.5 mm (0.6 in)
190829.0 mm (1.1 in)
191174.7 mm (2.9 in)
191227.9 mm (1.1 in)
191315.2 mm (0.6 in)
191438.1 mm (1.5 in)
191545.7 mm (1.8 in)
191682.6 mm (3.3 in)
191785.1 mm (3.4 in)
191825.4 mm (1.0 in)
191971.1 mm (2.8 in)
192027.7 mm (1.1 in)
192139.4 mm (1.6 in)
192255.9 mm (2.2 in)
192327.9 mm (1.1 in)
192415.5 mm (0.6 in)
192561.0 mm (2.4 in)
192679.2 mm (3.1 in)
192731.2 mm (1.2 in)
192820.3 mm (0.8 in)
192938.1 mm (1.5 in)
193031.2 mm (1.2 in)
193124.9 mm (1.0 in)
193219.8 mm (0.8 in)
193331.8 mm (1.3 in)
193425.4 mm (1.0 in)
193529.7 mm (1.2 in)
193635.6 mm (1.4 in)
193729.2 mm (1.1 in)
193817.8 mm (0.7 in)
193920.3 mm (0.8 in)
194030.5 mm (1.2 in)
194130.5 mm (1.2 in)
194220.1 mm (0.8 in)
194334.8 mm (1.4 in)
194413.2 mm (0.5 in)
194513.2 mm (0.5 in)
194668.3 mm (2.7 in)
194717.0 mm (0.7 in)
194822.6 mm (0.9 in)
194920.3 mm (0.8 in)
195030.5 mm (1.2 in)
195156.1 mm (2.2 in)
195217.8 mm (0.7 in)
19531.5 mm (0.06 in)
195550.8 mm (2.0 in)
195616.5 mm (0.6 in)
195732.3 mm (1.3 in)
19588.9 mm (0.35 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Maricopa 9 SSW by year The wettest five days of the year at Maricopa 9 SSW, 1898 to 1958. The record is 106.7 mm (4.2 in) in 1946, marked on the chart; the median year is 43.7 mm (1.7 in). 050100150190019101920193019401950Record: 106.7 mm (4.2 in) in 1946
The wettest five days of the year at Maricopa 9 SSW, 1898 to 1958. The record is 106.7 mm (4.2 in) in 1946, marked on the chart; the median year is 43.7 mm (1.7 in).
Wettest five days (Rx5day) at Maricopa 9 SSW by year
YearWettest five days (Rx5day)
189853.9 mm (2.1 in)
189943.9 mm (1.7 in)
19006.4 mm (0.25 in)
190141.9 mm (1.6 in)
190227.9 mm (1.1 in)
190366.6 mm (2.6 in)
190422.9 mm (0.9 in)
190546.2 mm (1.8 in)
190640.4 mm (1.6 in)
190740.4 mm (1.6 in)
190858.4 mm (2.3 in)
191190.2 mm (3.6 in)
191237.3 mm (1.5 in)
191324.9 mm (1.0 in)
191474.4 mm (2.9 in)
191548.7 mm (1.9 in)
1916105.5 mm (4.2 in)
191790.2 mm (3.6 in)
191844.0 mm (1.7 in)
191971.1 mm (2.8 in)
192032.8 mm (1.3 in)
192143.5 mm (1.7 in)
192255.9 mm (2.2 in)
192335.5 mm (1.4 in)
192419.3 mm (0.8 in)
192574.7 mm (2.9 in)
192679.2 mm (3.1 in)
192753.9 mm (2.1 in)
192820.3 mm (0.8 in)
192955.9 mm (2.2 in)
193062.6 mm (2.5 in)
193162.8 mm (2.5 in)
193233.5 mm (1.3 in)
193341.5 mm (1.6 in)
193425.4 mm (1.0 in)
193552.3 mm (2.1 in)
193659.3 mm (2.3 in)
193756.7 mm (2.2 in)
193828.4 mm (1.1 in)
193932.0 mm (1.3 in)
194045.7 mm (1.8 in)
194155.6 mm (2.2 in)
194226.7 mm (1.1 in)
194353.9 mm (2.1 in)
194430.2 mm (1.2 in)
194519.5 mm (0.8 in)
1946106.7 mm (4.2 in)
194717.0 mm (0.7 in)
194822.6 mm (0.9 in)
194926.9 mm (1.1 in)
195040.7 mm (1.6 in)
195161.2 mm (2.4 in)
195233.0 mm (1.3 in)
19531.5 mm (0.06 in)
195563.2 mm (2.5 in)
195616.5 mm (0.6 in)
195747.5 mm (1.9 in)
195813.2 mm (0.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Maricopa 9 SSW by year The longest dry spell of the year at Maricopa 9 SSW, 1898 to 1958. The record is 159 days in 1901, marked on the chart; the median year is 76 days. 050100150200190019101920193019401950Record: 159 days in 1901
The longest dry spell of the year at Maricopa 9 SSW, 1898 to 1958. The record is 159 days in 1901, marked on the chart; the median year is 76 days.
Longest dry spell (CDD) at Maricopa 9 SSW by year
YearLongest dry spell (CDD)
189889 days
1899119 days
1900119 days
1901159 days
1902119 days
190369 days
1904112 days
190576 days
190687 days
190756 days
190843 days
191150 days
191265 days
191386 days
191438 days
191570 days
191686 days
191776 days
191886 days
191962 days
192062 days
192163 days
192283 days
192358 days
192489 days
192566 days
192661 days
192753 days
1928148 days
1929103 days
193041 days
193189 days
193251 days
193399 days
193454 days
193578 days
193692 days
1937111 days
1938107 days
193978 days
194053 days
194175 days
1942117 days
194373 days
194430 days
1945124 days
194687 days
194783 days
194879 days
194976 days
1950130 days
195172 days
195225 days
195330 days
195558 days
195630 days
195731 days
195865 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Maricopa 9 SSW falls on 19 March and the median first autumn frost on 14 November, which leaves a median of 250 days between them.

Fitted over all years, the growing season changes by -5.3 days per decade at this station.

Frost dates and growing season at Maricopa 9 SSW
MeasureMedian, all yearsEarliest periodRecent period (1903 to 1950)Recent against earliestFitted trend
Last spring frost19 Marchn/a19 Marchn/a+1.3 days per decade
First autumn frost14 Novembern/a14 Novembern/a-3.9 days per decade
Growing days250 daysn/a250 daysn/a-5.3 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

43 years, 1899 to 1951

A day with at least 29.3 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 113.3 mm (4.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Maricopa 9 SSW: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years29.3 mm (1.2 in)
5 years45.8 mm (1.8 in)
10 years58.8 mm (2.3 in)
25 years78.0 mm (3.1 in)
50 years94.6 mm (3.7 in)Longer than the 43 years of record
100 years113.3 mm (4.5 in)Longer than the 43 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, 43 years of values from 1899 to 1951.

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: 85.1 mm (3.4 in) in 1917; 82.6 mm (3.3 in) in 1916; 79.2 mm (3.1 in) in 1926.

Download the Data

  • Data for Maricopa 9 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Maricopa 9 SSW 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).