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Napoleon Weather Records (USC00335664)

Record envelope, standing records and threshold days for Napoleon (USC00335664), Ohio, United States, with 70 years of record.

Key Facts for Napoleon

  • Napoleon (USC00335664) is a weather station in Ohio, United States at 41.38 latitude and -84.12 longitude, 207 m (679 ft) above sea level.
  • The station reports from 1893 to 1962, 70 years of record.
  • 1,464 records set at Napoleon still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Napoleon set a daily record high minimum temperature of 19.4 C (66.9 F) on 19 May 1962.

About the Station

  • Location: Ohio, United States, 41.38 latitude, -84.12 longitude.
  • Elevation: 207 m (679 ft).
  • Period of record: 1893 to 1962, 70 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 Napoleon, with 2026 drawn through them The band shows the record high and record low for each calendar day at Napoleon. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Napoleon. 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 Napoleon, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan22.2 C (72.0 F)-28.3 C (-18.9 F)n/an/a
Feb21.7 C (71.1 F)-30.0 C (-22.0 F)n/an/a
Mar35.6 C (96.1 F)-22.8 C (-9.0 F)n/an/a
Apr32.2 C (90.0 F)-11.7 C (10.9 F)n/an/a
May37.2 C (99.0 F)-3.3 C (26.1 F)n/an/a
Jun40.6 C (105.1 F)2.2 C (36.0 F)n/an/a
Jul43.3 C (109.9 F)5.0 C (41.0 F)n/an/a
Aug43.9 C (111.0 F)2.2 C (36.0 F)n/an/a
Sep40.6 C (105.1 F)-4.4 C (24.1 F)n/an/a
Oct34.4 C (93.9 F)-10.0 C (14.0 F)n/an/a
Nov26.7 C (80.1 F)-17.8 C (0.0 F)n/an/a
Dec19.4 C (66.9 F)-29.4 C (-20.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Napoleon by the year they were set 1,464 records at Napoleon still stand. 1895 holds the most, with 50. 02040601893: 131894: 371895: 501896: 401897: 341898: 221899: 361900: 251901: 181902: 211903: 211904: 171905: 171906: 231907: 211908: 161909: 181910: 161911: 341912: 261913: 221914: 261915: 321916: 171917: 261918: 271919: 151920: 201921: 191922: 101923: 181924: 201925: 301926: 141927: 181928: 241929: 261930: 341931: 181932: 211933: 221934: 261935: 141936: 351937: 91938: 101939: 111940: 181941: 221942: 141943: 181944: 231945: 261946: 271947: 261948: 111949: 121950: 281951: 301952: 121953: 261954: 151955: 91956: 91957: 101958: 91959: 171960: 181961: 51962: 101893190019071914192119281935194219491956
1,464 records at Napoleon still stand. 1895 holds the most, with 50.
Standing records at Napoleon by the year they were set
Year setStanding records
189313
189437
189550
189640
189734
189822
189936
190025
190118
190221
190321
190417
190517
190623
190721
190816
190918
191016
191134
191226
191322
191426
191532
191617
191726
191827
191915
192020
192119
192210
192318
192420
192530
192614
192718
192824
192926
193034
193118
193221
193322
193426
193514
193635
19379
193810
193911
194018
194122
194214
194318
194423
194526
194627
194726
194811
194912
195028
195130
195212
195326
195415
19559
19569
195710
19589
195917
196018
19615
196210

All-Time Record Progression

5 new records
When Napoleon set new all-time records 5 all-time records were set at Napoleon between 20 July 1930 and 6 August 1947. Each dot is a new record. Record high maximum temperatureRecord high minimum temperature20 July 1930: Record high maximum temperature 41.1 C (106.0 F)24 July 1934: Record high maximum temperature 42.2 C (108.0 F)14 July 1936: Record high maximum temperature 43.3 C (109.9 F)25 June 1943: Record high minimum temperature 30.0 C (86.0 F)6 August 1947: Record high maximum temperature 43.9 C (111.0 F)1930193519401945
5 all-time records were set at Napoleon between 20 July 1930 and 6 August 1947. Each dot is a new record.
When Napoleon set new all-time records
DateKindDetail
1930-07-20Record high maximum temperatureRecord high maximum temperature 41.1 C (106.0 F)
1934-07-24Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)
1936-07-14Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1943-06-25Record high minimum temperatureRecord high minimum temperature 30.0 C (86.0 F)
1947-08-06Record high maximum temperatureRecord high maximum temperature 43.9 C (111.0 F)

Wettest Day of Each Month

Aug: 117.6 mm (4.6 in)
Record daily precipitation for each month at Napoleon The wettest day on record for each calendar month at Napoleon. The most was 117.6 mm (4.6 in) on 17 August 1920. 050100150 Jan: 50.8 mm (2.0 in), 30 January 1947 Jan Feb: 53.1 mm (2.1 in), 29 February 1904 Feb Mar: 65.3 mm (2.6 in), 23 March 1913 Mar Apr: 82.6 mm (3.3 in), 29 April 1956 Apr May: 64.5 mm (2.5 in), 26 May 1913 May Jun: 110.0 mm (4.3 in), 28 June 1894 Jun Jul: 80.5 mm (3.2 in), 24 July 1908 Jul Aug: 117.6 mm (4.6 in), 17 August 1920 Aug Sep: 89.4 mm (3.5 in), 1 September 1950 Sep Oct: 70.6 mm (2.8 in), 22 October 1929 Oct Nov: 44.5 mm (1.8 in), 22 November 1909 Nov Dec: 38.6 mm (1.5 in), 14 December 1928 Dec
The wettest day on record for each calendar month at Napoleon. The most was 117.6 mm (4.6 in) on 17 August 1920.
Record daily precipitation for each month at Napoleon
MonthRecord daily precipitation (mm)Date
Jan50.8 mm (2.0 in)30 January 1947
Feb53.1 mm (2.1 in)29 February 1904
Mar65.3 mm (2.6 in)23 March 1913
Apr82.6 mm (3.3 in)29 April 1956
May64.5 mm (2.5 in)26 May 1913
Jun110.0 mm (4.3 in)28 June 1894
Jul80.5 mm (3.2 in)24 July 1908
Aug117.6 mm (4.6 in)17 August 1920
Sep89.4 mm (3.5 in)1 September 1950
Oct70.6 mm (2.8 in)22 October 1929
Nov44.5 mm (1.8 in)22 November 1909
Dec38.6 mm (1.5 in)14 December 1928

Period of Record Coverage

1893 to 1962
Days with data per year at Napoleon 70 years of record at Napoleon, 1893 to 1962. 3 years have data for under 90 percent of days and are left out of rankings: 1893, 1898, 1962. 1893: 162 of 365 days1894: 365 of 365 days1895: 357 of 365 days1896: 332 of 366 days1897: 344 of 365 days1898: 326 of 365 days1899: 360 of 365 days1900: 358 of 365 days1901: 360 of 365 days1902: 359 of 365 days1903: 360 of 365 days1904: 363 of 366 days1905: 364 of 365 days1906: 364 of 365 days1907: 364 of 365 days1908: 365 of 366 days1909: 365 of 365 days1910: 365 of 365 days1911: 363 of 365 days1912: 366 of 366 days1913: 360 of 365 days1914: 360 of 365 days1915: 362 of 365 days1916: 365 of 366 days1917: 364 of 365 days1918: 364 of 365 days1919: 365 of 365 days1920: 363 of 366 days1921: 364 of 365 days1922: 364 of 365 days1923: 364 of 365 days1924: 365 of 366 days1925: 363 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 365 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 364 of 365 days1932: 366 of 366 days1933: 364 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 361 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 365 of 366 days1941: 364 of 365 days1942: 365 of 365 days1943: 364 of 365 days1944: 365 of 366 days1945: 364 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 365 of 366 days1949: 334 of 365 days1950: 363 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 364 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 364 of 366 days1961: 361 of 365 days1962: 149 of 365 days1900191019201930194019501960
70 years of record at Napoleon, 1893 to 1962. 3 years have data for under 90 percent of days and are left out of rankings: 1893, 1898, 1962.
Days with data per year at Napoleon
YearDays with dataShare of yearComplete
189316244%No
1894365100%Yes
189535798%Yes
189633291%Yes
189734494%Yes
189832689%No
189936099%Yes
190035898%Yes
190136099%Yes
190235998%Yes
190336099%Yes
190436399%Yes
1905364100%Yes
1906364100%Yes
1907364100%Yes
1908365100%Yes
1909365100%Yes
1910365100%Yes
191136399%Yes
1912366100%Yes
191336099%Yes
191436099%Yes
191536299%Yes
1916365100%Yes
1917364100%Yes
1918364100%Yes
1919365100%Yes
192036399%Yes
1921364100%Yes
1922364100%Yes
1923364100%Yes
1924365100%Yes
192536399%Yes
1926365100%Yes
1927365100%Yes
1928365100%Yes
1929365100%Yes
1930365100%Yes
1931364100%Yes
1932366100%Yes
1933364100%Yes
1934365100%Yes
1935365100%Yes
193636199%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940365100%Yes
1941364100%Yes
1942365100%Yes
1943364100%Yes
1944365100%Yes
1945364100%Yes
1946365100%Yes
1947365100%Yes
1948365100%Yes
194933492%Yes
195036399%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
195636499%Yes
1957365100%Yes
1958365100%Yes
1959364100%Yes
196036499%Yes
196136199%Yes
196214941%No

Latest Records

20
Latest records at Napoleon
DateStationRecordValueBeat old record byOld record stoodSignificance
19 May 1962Napoleon, USdaily high min19.4 C (66.9 F)0.5 C (0.9 F)51 years23 of 100 (Routine)
18 May 1962Napoleon, USdaily high min (Tie)18.3 C (64.9 F)tie51 years5 of 100 (Routine)
17 May 1962Napoleon, USdaily high max34.4 C (93.9 F)2.2 C (4.0 F)59 years27 of 100 (Routine)
16 May 1962Napoleon, USdaily high max32.8 C (91.0 F)0.6 C (1.1 F)51 years23 of 100 (Routine)
16 May 1962Napoleon, USdaily high min17.2 C (63.0 F)0.5 C (0.9 F)51 years23 of 100 (Routine)
15 May 1962Napoleon, USdaily high min18.3 C (64.9 F)1.1 C (2.0 F)0 years9 of 100 (Routine)
15 May 1962Napoleon, USdaily high max (Tie)32.2 C (90.0 F)tie29 years3 of 100 (Routine)
30 April 1962Napoleon, USmonthly high max (Tie)32.2 C (90.0 F)tie63 years8 of 100 (Routine)
27 April 1962Napoleon, USdaily high max (Tie)29.4 C (84.9 F)tie40 years4 of 100 (Routine)
22 April 1962Napoleon, USdaily high min14.4 C (57.9 F)0.5 C (0.9 F)9 years10 of 100 (Routine)
6 March 1962Napoleon, USdaily snow depth27.9 cm (11.0 in)10.1 cm (4.0 in)62 years39 of 100 (Notable)
5 March 1962Napoleon, USdaily rain18.3 mm (0.7 in)1.8 mm (0.07 in)47 years20 of 100 (Routine)
5 March 1962Napoleon, USmonthly snowfall (Tie)20.3 cm (8.0 in)tie57 years8 of 100 (Routine)
1 March 1962Napoleon, USdaily low max (Tie)-6.7 C (19.9 F)tie48 years5 of 100 (Routine)
24 February 1962Napoleon, USdaily rain19.1 mm (0.8 in)10.5 mm (0.4 in)22 years20 of 100 (Routine)
24 February 1962Napoleon, USdaily snowfall15.2 cm (6.0 in)5.0 cm (2.0 in)23 years21 of 100 (Routine)
22 February 1962Napoleon, USdaily snow depth (Tie)15.2 cm (6.0 in)tie54 years5 of 100 (Routine)
4 February 1962Napoleon, USdaily high max11.1 C (52.0 F)1.1 C (2.0 F)52 years23 of 100 (Routine)
3 February 1962Napoleon, USdaily snowfall (Tie)7.6 cm (3.0 in)tie0 years1 of 100 (Routine)
29 January 1962Napoleon, USdaily snowfall7.6 cm (3.0 in)2.5 cm (1.0 in)23 years18 of 100 (Routine)

Climate Trend

63 complete years, 1895 to 1961
Annual mean temperature at Napoleon as warming stripes, 1895 to 1961 One stripe for each of 63 complete years at Napoleon, 1895 to 1961. Blue stripes are years cooler than the station's own mean of 10.1 C (50.2 F); red stripes are warmer. The coolest year was 1917, at 8.0 C (46.4 F), and the warmest was 1921, at 11.9 C (53.4 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1895: 9.0 C, -1.1 C from the station mean1899: 9.4 C, -0.7 C from the station mean1900: 10.6 C, +0.4 C from the station mean1901: 9.8 C, -0.3 C from the station mean1902: 10.3 C, +0.2 C from the station mean1903: 9.8 C, -0.3 C from the station mean1904: 8.5 C, -1.6 C from the station mean1905: 9.7 C, -0.4 C from the station mean1906: 10.6 C, +0.4 C from the station mean1907: 9.6 C, -0.5 C from the station mean1908: 10.9 C, +0.7 C from the station mean1909: 10.1 C, 0.0 C from the station mean1910: 10.2 C, +0.1 C from the station mean1911: 11.1 C, +0.9 C from the station mean1912: 8.9 C, -1.2 C from the station mean1913: 10.4 C, +0.3 C from the station mean1914: 9.6 C, -0.5 C from the station mean1915: 9.4 C, -0.7 C from the station mean1916: 9.6 C, -0.5 C from the station mean1917: 8.0 C, -2.1 C from the station mean1918: 10.3 C, +0.2 C from the station mean1919: 10.3 C, +0.2 C from the station mean1920: 9.4 C, -0.7 C from the station mean1921: 11.9 C, +1.8 C from the station mean1922: 10.5 C, +0.4 C from the station mean1923: 9.6 C, -0.5 C from the station mean1924: 8.3 C, -1.8 C from the station mean1925: 9.4 C, -0.7 C from the station mean1926: 8.6 C, -1.5 C from the station mean1927: 10.0 C, -0.1 C from the station mean1928: 9.8 C, -0.4 C from the station mean1929: 9.2 C, -0.9 C from the station mean1930: 10.4 C, +0.3 C from the station mean1931: 11.6 C, +1.5 C from the station mean1932: 10.3 C, +0.2 C from the station mean1933: 10.8 C, +0.7 C from the station mean1934: 10.2 C, +0.1 C from the station mean1935: 9.7 C, -0.4 C from the station mean1936: 9.8 C, -0.3 C from the station mean1937: 9.8 C, -0.3 C from the station mean1938: 11.3 C, +1.2 C from the station mean1939: 10.9 C, +0.8 C from the station mean1940: 9.2 C, -0.9 C from the station mean1941: 11.1 C, +1.0 C from the station mean1942: 10.5 C, +0.4 C from the station mean1943: 9.9 C, -0.2 C from the station mean1944: 10.8 C, +0.7 C from the station mean1945: 10.1 C, 0.0 C from the station mean1946: 11.6 C, +1.5 C from the station mean1947: 10.3 C, +0.2 C from the station mean1948: 10.4 C, +0.3 C from the station mean1950: 9.3 C, -0.8 C from the station mean1951: 10.0 C, -0.1 C from the station mean1952: 11.1 C, +1.0 C from the station mean1953: 11.7 C, +1.6 C from the station mean1954: 11.2 C, +1.1 C from the station mean1955: 11.2 C, +1.0 C from the station mean1956: 10.6 C, +0.4 C from the station mean1957: 10.4 C, +0.3 C from the station mean1958: 9.6 C, -0.5 C from the station mean1959: 10.7 C, +0.6 C from the station mean1960: 9.9 C, -0.2 C from the station mean1961: 10.3 C, +0.2 C from the station mean18951900191019201930194019501960
One stripe for each of 63 complete years at Napoleon, 1895 to 1961. Blue stripes are years cooler than the station's own mean of 10.1 C (50.2 F); red stripes are warmer. The coolest year was 1917, at 8.0 C (46.4 F), and the warmest was 1921, at 11.9 C (53.4 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Napoleon as warming stripes, 1895 to 1961
YearAnnual mean temperatureDifference from the station mean
18959.0 C-1.12 C
18999.4 C-0.75 C
190010.6 C+0.44 C
19019.8 C-0.34 C
190210.3 C+0.22 C
19039.8 C-0.35 C
19048.5 C-1.62 C
19059.7 C-0.43 C
190610.6 C+0.43 C
19079.6 C-0.54 C
190810.9 C+0.74 C
190910.1 C-0.02 C
191010.2 C+0.11 C
191111.1 C+0.94 C
19128.9 C-1.23 C
191310.4 C+0.25 C
19149.6 C-0.54 C
19159.4 C-0.74 C
19169.6 C-0.48 C
19178.0 C-2.10 C
191810.3 C+0.16 C
191910.3 C+0.21 C
19209.4 C-0.69 C
192111.9 C+1.79 C
192210.5 C+0.36 C
19239.6 C-0.48 C
19248.3 C-1.85 C
19259.4 C-0.73 C
19268.6 C-1.52 C
192710.0 C-0.09 C
19289.8 C-0.37 C
19299.2 C-0.90 C
193010.4 C+0.31 C
193111.6 C+1.52 C
193210.3 C+0.19 C
193310.8 C+0.72 C
193410.2 C+0.06 C
19359.7 C-0.45 C
19369.8 C-0.28 C
19379.8 C-0.30 C
193811.3 C+1.21 C
193910.9 C+0.75 C
19409.2 C-0.91 C
194111.1 C+1.01 C
194210.5 C+0.37 C
19439.9 C-0.25 C
194410.8 C+0.65 C
194510.1 C+0.00 C
194611.6 C+1.46 C
194710.3 C+0.18 C
194810.4 C+0.29 C
19509.3 C-0.78 C
195110.0 C-0.15 C
195211.1 C+0.99 C
195311.7 C+1.56 C
195411.2 C+1.08 C
195511.2 C+1.03 C
195610.6 C+0.44 C
195710.4 C+0.27 C
19589.6 C-0.55 C
195910.7 C+0.57 C
19609.9 C-0.19 C
196110.3 C+0.18 C

The annual mean temperature here has risen by 0.15 C (0.05 to 0.26) per decade over 1895 to 1961. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Napoleon
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.15 C (0.05 to 0.26) per decade0.3 F (0.1 to 0.5) per decade1895 to 196163Rise
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.6) per decade1895 to 196163Rise
Mean daily minimum0.09 C (-0.02 to 0.19) per decade0.16 F (-0.03 to 0.35) per decade1895 to 196163Not clearly different from zero

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 1962
Yearly extremes at Napoleon: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)194736.7 C (98.1 F)70
Coldest night (TNn)-30.0 C (-22.0 F)1899-22.8 C (-9.0 F)70
Wettest day (Rx1day)117.6 mm (4.6 in)192055.9 mm (2.2 in)70
Wettest five days (Rx5day)178.8 mm (7.0 in)192682.8 mm (3.3 in)70
Longest dry spell (CDD)40 days191418 days70

Hottest day (TXx)

Hottest day (TXx) at Napoleon by year The hottest day of the year at Napoleon, 1893 to 1962. The record is 43.9 C (111.0 F) in 1947, marked on the chart; the median year is 36.7 C (98.1 F). 303540451900192019401960Record: 43.9 C (111.0 F) in 1947
The hottest day of the year at Napoleon, 1893 to 1962. The record is 43.9 C (111.0 F) in 1947, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Napoleon by year
YearHottest day (TXx)
189335.0 C (95.0 F)
189437.8 C (100.0 F)
189538.9 C (102.0 F)
189636.1 C (97.0 F)
189740.0 C (104.0 F)
189837.2 C (99.0 F)
189936.1 C (97.0 F)
190033.9 C (93.0 F)
190136.1 C (97.0 F)
190233.9 C (93.0 F)
190333.9 C (93.0 F)
190433.3 C (91.9 F)
190533.9 C (93.0 F)
190635.0 C (95.0 F)
190735.6 C (96.1 F)
190835.6 C (96.1 F)
190934.4 C (93.9 F)
191035.0 C (95.0 F)
191137.8 C (100.0 F)
191235.6 C (96.1 F)
191337.8 C (100.0 F)
191437.8 C (100.0 F)
191535.0 C (95.0 F)
191638.3 C (100.9 F)
191736.7 C (98.1 F)
191840.6 C (105.1 F)
191938.3 C (100.9 F)
192036.7 C (98.1 F)
192137.8 C (100.0 F)
192235.0 C (95.0 F)
192335.6 C (96.1 F)
192435.0 C (95.0 F)
192536.7 C (98.1 F)
192635.0 C (95.0 F)
192735.6 C (96.1 F)
192834.4 C (93.9 F)
192933.9 C (93.0 F)
193041.1 C (106.0 F)
193137.2 C (99.0 F)
193237.8 C (100.0 F)
193339.4 C (102.9 F)
193442.2 C (108.0 F)
193536.1 C (97.0 F)
193643.3 C (109.9 F)
193735.6 C (96.1 F)
193834.4 C (93.9 F)
193937.8 C (100.0 F)
194037.2 C (99.0 F)
194140.6 C (105.1 F)
194237.2 C (99.0 F)
194337.2 C (99.0 F)
194440.6 C (105.1 F)
194537.2 C (99.0 F)
194636.7 C (98.1 F)
194743.9 C (111.0 F)
194838.9 C (102.0 F)
194936.1 C (97.0 F)
195035.0 C (95.0 F)
195141.1 C (106.0 F)
195240.6 C (105.1 F)
195340.6 C (105.1 F)
195437.8 C (100.0 F)
195539.4 C (102.9 F)
195636.7 C (98.1 F)
195735.6 C (96.1 F)
195833.3 C (91.9 F)
195936.7 C (98.1 F)
196036.1 C (97.0 F)
196135.0 C (95.0 F)
196234.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Napoleon by year The coldest night of the year at Napoleon, 1893 to 1962. The record is -30.0 C (-22.0 F) in 1899, marked on the chart; the median year is -22.8 C (-9.0 F). -30-25-20-15-101900192019401960Record: -30.0 C (-22.0 F) in 1899
The coldest night of the year at Napoleon, 1893 to 1962. The record is -30.0 C (-22.0 F) in 1899, marked on the chart; the median year is -22.8 C (-9.0 F).
Coldest night (TNn) at Napoleon by year
YearColdest night (TNn)
1893-12.8 C (9.0 F)
1894-20.0 C (-4.0 F)
1895-23.9 C (-11.0 F)
1896-23.9 C (-11.0 F)
1897-28.3 C (-18.9 F)
1898-20.6 C (-5.1 F)
1899-30.0 C (-22.0 F)
1900-22.8 C (-9.0 F)
1901-23.3 C (-9.9 F)
1902-21.7 C (-7.1 F)
1903-20.6 C (-5.1 F)
1904-25.0 C (-13.0 F)
1905-26.7 C (-16.1 F)
1906-21.7 C (-7.1 F)
1907-19.4 C (-2.9 F)
1908-17.8 C (0.0 F)
1909-21.7 C (-7.1 F)
1910-18.9 C (-2.0 F)
1911-16.7 C (1.9 F)
1912-27.2 C (-17.0 F)
1913-20.0 C (-4.0 F)
1914-25.6 C (-14.1 F)
1915-26.1 C (-15.0 F)
1916-21.7 C (-7.1 F)
1917-29.4 C (-20.9 F)
1918-27.2 C (-17.0 F)
1919-17.8 C (0.0 F)
1920-22.8 C (-9.0 F)
1921-16.1 C (3.0 F)
1922-27.8 C (-18.0 F)
1923-16.7 C (1.9 F)
1924-25.0 C (-13.0 F)
1925-22.8 C (-9.0 F)
1926-21.7 C (-7.1 F)
1927-22.8 C (-9.0 F)
1928-20.0 C (-4.0 F)
1929-28.9 C (-20.0 F)
1930-25.6 C (-14.1 F)
1931-11.7 C (10.9 F)
1932-21.1 C (-6.0 F)
1933-24.4 C (-11.9 F)
1934-28.9 C (-20.0 F)
1935-20.0 C (-4.0 F)
1936-28.3 C (-18.9 F)
1937-20.6 C (-5.1 F)
1938-18.3 C (-0.9 F)
1939-17.8 C (0.0 F)
1940-27.2 C (-17.0 F)
1941-15.0 C (5.0 F)
1942-25.0 C (-13.0 F)
1943-22.8 C (-9.0 F)
1944-27.2 C (-17.0 F)
1945-23.3 C (-9.9 F)
1946-20.6 C (-5.1 F)
1947-19.4 C (-2.9 F)
1948-22.8 C (-9.0 F)
1949-17.2 C (1.0 F)
1950-27.8 C (-18.0 F)
1951-27.2 C (-17.0 F)
1952-14.4 C (6.1 F)
1953-19.4 C (-2.9 F)
1954-16.7 C (1.9 F)
1955-21.1 C (-6.0 F)
1956-21.1 C (-6.0 F)
1957-22.8 C (-9.0 F)
1958-22.8 C (-9.0 F)
1959-22.2 C (-8.0 F)
1960-23.9 C (-11.0 F)
1961-22.8 C (-9.0 F)
1962-23.3 C (-9.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Napoleon by year The wettest day of the year at Napoleon, 1893 to 1962. The record is 117.6 mm (4.6 in) in 1920, marked on the chart; the median year is 55.9 mm (2.2 in). 02550751001251900192019401960Record: 117.6 mm (4.6 in) in 1920
The wettest day of the year at Napoleon, 1893 to 1962. The record is 117.6 mm (4.6 in) in 1920, marked on the chart; the median year is 55.9 mm (2.2 in).
Wettest day (Rx1day) at Napoleon by year
YearWettest day (Rx1day)
189357.2 mm (2.3 in)
1894110.0 mm (4.3 in)
189536.1 mm (1.4 in)
189664.8 mm (2.6 in)
189738.1 mm (1.5 in)
189841.9 mm (1.6 in)
189958.7 mm (2.3 in)
190062.7 mm (2.5 in)
190145.7 mm (1.8 in)
190255.9 mm (2.2 in)
190366.0 mm (2.6 in)
190453.1 mm (2.1 in)
190560.5 mm (2.4 in)
190635.6 mm (1.4 in)
190738.9 mm (1.5 in)
190880.5 mm (3.2 in)
190950.8 mm (2.0 in)
191056.1 mm (2.2 in)
191145.7 mm (1.8 in)
191246.7 mm (1.8 in)
191365.3 mm (2.6 in)
191462.5 mm (2.5 in)
191546.2 mm (1.8 in)
191640.9 mm (1.6 in)
191758.7 mm (2.3 in)
191861.0 mm (2.4 in)
191969.9 mm (2.8 in)
1920117.6 mm (4.6 in)
192133.0 mm (1.3 in)
192269.9 mm (2.8 in)
192347.0 mm (1.9 in)
192433.0 mm (1.3 in)
192536.6 mm (1.4 in)
192681.8 mm (3.2 in)
192749.5 mm (1.9 in)
192838.6 mm (1.5 in)
192970.6 mm (2.8 in)
193076.7 mm (3.0 in)
193150.8 mm (2.0 in)
193259.7 mm (2.4 in)
193362.7 mm (2.5 in)
193464.0 mm (2.5 in)
193530.5 mm (1.2 in)
193634.3 mm (1.4 in)
1937108.0 mm (4.3 in)
193867.3 mm (2.6 in)
193967.8 mm (2.7 in)
194041.7 mm (1.6 in)
194125.9 mm (1.0 in)
194276.7 mm (3.0 in)
194339.4 mm (1.6 in)
194440.1 mm (1.6 in)
194556.1 mm (2.2 in)
194660.2 mm (2.4 in)
194750.8 mm (2.0 in)
194858.4 mm (2.3 in)
194963.0 mm (2.5 in)
195092.5 mm (3.6 in)
195143.9 mm (1.7 in)
195242.7 mm (1.7 in)
195355.9 mm (2.2 in)
195454.6 mm (2.1 in)
195540.6 mm (1.6 in)
195682.6 mm (3.3 in)
195788.9 mm (3.5 in)
195854.6 mm (2.1 in)
195957.2 mm (2.3 in)
196032.3 mm (1.3 in)
196132.5 mm (1.3 in)
196220.8 mm (0.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Napoleon by year The wettest five days of the year at Napoleon, 1893 to 1962. The record is 178.8 mm (7.0 in) in 1926, marked on the chart; the median year is 82.8 mm (3.3 in). 0501001502001900192019401960Record: 178.8 mm (7.0 in) in 1926
The wettest five days of the year at Napoleon, 1893 to 1962. The record is 178.8 mm (7.0 in) in 1926, marked on the chart; the median year is 82.8 mm (3.3 in).
Wettest five days (Rx5day) at Napoleon by year
YearWettest five days (Rx5day)
189358.4 mm (2.3 in)
189447.6 mm (1.9 in)
189534.5 mm (1.4 in)
189668.6 mm (2.7 in)
189731.5 mm (1.2 in)
189848.7 mm (1.9 in)
189970.1 mm (2.8 in)
190069.6 mm (2.7 in)
190187.6 mm (3.4 in)
190296.3 mm (3.8 in)
190392.5 mm (3.6 in)
1904101.8 mm (4.0 in)
1905124.9 mm (4.9 in)
190669.6 mm (2.7 in)
190779.9 mm (3.1 in)
1908103.1 mm (4.1 in)
190973.1 mm (2.9 in)
191089.1 mm (3.5 in)
191183.3 mm (3.3 in)
191266.8 mm (2.6 in)
1913121.2 mm (4.8 in)
1914120.2 mm (4.7 in)
191571.1 mm (2.8 in)
191660.1 mm (2.4 in)
191788.7 mm (3.5 in)
1918117.9 mm (4.6 in)
191994.5 mm (3.7 in)
1920176.0 mm (6.9 in)
192160.5 mm (2.4 in)
1922112.6 mm (4.4 in)
192393.1 mm (3.7 in)
192462.8 mm (2.5 in)
192582.5 mm (3.2 in)
1926178.8 mm (7.0 in)
192772.1 mm (2.8 in)
192886.4 mm (3.4 in)
1929132.1 mm (5.2 in)
193099.1 mm (3.9 in)
193158.5 mm (2.3 in)
193275.4 mm (3.0 in)
193373.1 mm (2.9 in)
193466.8 mm (2.6 in)
193546.5 mm (1.8 in)
193670.6 mm (2.8 in)
1937121.1 mm (4.8 in)
1938115.8 mm (4.6 in)
193981.0 mm (3.2 in)
194083.0 mm (3.3 in)
194185.3 mm (3.4 in)
194297.0 mm (3.8 in)
194398.9 mm (3.9 in)
1944104.6 mm (4.1 in)
1945144.0 mm (5.7 in)
194667.6 mm (2.7 in)
194780.8 mm (3.2 in)
194864.5 mm (2.5 in)
194981.9 mm (3.2 in)
1950109.0 mm (4.3 in)
195178.7 mm (3.1 in)
195269.9 mm (2.8 in)
195383.2 mm (3.3 in)
195464.8 mm (2.6 in)
195589.7 mm (3.5 in)
195691.2 mm (3.6 in)
195796.0 mm (3.8 in)
1958130.0 mm (5.1 in)
195991.7 mm (3.6 in)
196059.7 mm (2.4 in)
196165.5 mm (2.6 in)
196238.4 mm (1.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Napoleon by year The longest dry spell of the year at Napoleon, 1893 to 1962. The record is 40 days in 1914, marked on the chart; the median year is 18 days. 0102030401900192019401960Record: 40 days in 1914
The longest dry spell of the year at Napoleon, 1893 to 1962. The record is 40 days in 1914, marked on the chart; the median year is 18 days.
Longest dry spell (CDD) at Napoleon by year
YearLongest dry spell (CDD)
18932 days
18942 days
189522 days
18969 days
189711 days
189815 days
189937 days
190026 days
190126 days
190219 days
190319 days
190428 days
190518 days
190615 days
190717 days
190839 days
190912 days
191020 days
191115 days
191218 days
191321 days
191440 days
191524 days
191619 days
191722 days
191819 days
191921 days
192034 days
192115 days
192216 days
192322 days
192423 days
192532 days
192616 days
192718 days
192815 days
192913 days
193028 days
193117 days
193218 days
193319 days
193420 days
193515 days
193628 days
193719 days
193817 days
193914 days
194015 days
194116 days
194229 days
194325 days
194429 days
194515 days
194616 days
194718 days
194817 days
194921 days
195014 days
195116 days
195225 days
195327 days
195419 days
195516 days
195616 days
195722 days
195819 days
195912 days
196017 days
196116 days
196212 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

63 years with a frost

Across 63 years with a frost, the median last spring frost at Napoleon falls on 2 May and the median first autumn frost on 12 October, which leaves a median of 162 days between them.

In 1931 to 1961 the median growing season was 161 days. That is 5 days fewer than in 1895 to 1927.

Fitted over all years, the growing season changes by -0.7 days per decade at this station.

Frost dates and growing season at Napoleon
MeasureMedian, all yearsEarliest period (1895 to 1927)Recent period (1931 to 1961)Recent against earliestFitted trend
Last spring frost2 May4 May2 May2 days earlier+0.3 days per decade
First autumn frost12 October13 October12 October1 day earlier-0.5 days per decade
Growing days162 days166 days161 days5 days fewer-0.7 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

63 years, 1899 to 1961

A day with at least 53.8 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 111.4 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Napoleon: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years53.8 mm (2.1 in)
5 years70.2 mm (2.8 in)
10 years80.6 mm (3.2 in)
25 years93.4 mm (3.7 in)
50 years102.5 mm (4.0 in)
100 years111.4 mm (4.4 in)Longer than the 63 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, 63 years of values from 1899 to 1961.

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: 117.6 mm (4.6 in) in 1920; 108.0 mm (4.3 in) in 1937; 92.5 mm (3.6 in) in 1950.

Station Changes

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

Download the Data

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