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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Namu Threshold Days by Year

6 fixed thresholds counted per year at Namu (CA001065310): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Namu Thresholds

  • Namu: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1940 with 116.
  • Namu: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 1940 with 51.
  • Namu: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1939 with 20.
  • Namu: days with 10 cm (3.9 in) or more of snowfall in 12 years, most in 1933 with 9.
  • 6 fixed thresholds have at least one qualifying day at Namu.
19 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Namu Days per year at Namu with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 116 in 1940. 0501001501932: 1121933: 1081934: 1031935: 681936: 1001937: 561938: 871939: 1141940: 1161941: 1081942: 771943: 771944: 821945: 1161947: 321955: 1031956: 911957: 921958: 961932193419361938194019421944194719561958
Days per year at Namu with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 116 in 1940.
Days with 10 mm (0.39 in) or more of precipitation per year at Namu
YearDaysDecade average
193211293.5
193310893.5
193410393.5
19356893.5
193610093.5
19375693.5
19388793.5
193911493.5
194011686.9
194110886.9
19427786.9
19437786.9
19448286.9
194511686.9
19473286.9
195510395.5
19569195.5
19579295.5
19589695.5
First to last qualifying date each year at Namu For each year, a bar from the first to the last day at Namu meeting 10 mm (0.39 in). 1932: 5 January 1932 to 31 December 19321933: 1 January 1933 to 31 December 19331934: 1 January 1934 to 31 December 19341935: 5 January 1935 to 31 December 19351936: 1 January 1936 to 24 December 19361937: 8 January 1937 to 31 December 19371938: 13 January 1938 to 31 December 19381939: 1 January 1939 to 30 December 19391940: 2 January 1940 to 31 December 19401941: 1 January 1941 to 22 December 19411942: 11 January 1942 to 29 December 19421943: 18 January 1943 to 30 December 19431944: 2 January 1944 to 27 December 19441945: 1 January 1945 to 31 December 19451947: 3 February 1947 to 17 December 19471955: 4 January 1955 to 24 December 19551956: 5 January 1956 to 31 December 19561957: 5 January 1957 to 30 December 19571958: 2 January 1958 to 30 December 19581932193519381941194419551958JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Namu meeting 10 mm (0.39 in).
First to last qualifying date each year at Namu
YearFirst dateLast date
19321932-01-051932-12-31
19331933-01-011933-12-31
19341934-01-011934-12-31
19351935-01-051935-12-31
19361936-01-011936-12-24
19371937-01-081937-12-31
19381938-01-131938-12-31
19391939-01-011939-12-30
19401940-01-021940-12-31
19411941-01-011941-12-22
19421942-01-111942-12-29
19431943-01-181943-12-30
19441944-01-021944-12-27
19451945-01-011945-12-31
19471947-02-031947-12-17
19551955-01-041955-12-24
19561956-01-051956-12-31
19571957-01-051957-12-30
19581958-01-021958-12-30

Every Fixed Threshold

Fixed thresholds at Namu
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain19116194096
25 mm (0.98 in): Days with 25 mm or more rain1851194025
50 mm (1.97 in): Days with 50 mm or more rain182019395
100 mm (3.94 in): Days with 100 mm or more rain8419361
10 cm (3.9 in): Days with 10 cm or more snowfall12919331
25 cm (9.8 in): Days with 25 cm or more snowfall3219551

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

  • Data for Namu 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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