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Built 2026-10-19 (19 October 2026)

Williston 5SW Threshold Days by Year (USC00329420)

4 fixed thresholds counted per year at Williston 5SW (USC00329420): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williston 5SW Thresholds

  • Williston 5SW: days with 10 mm (0.39 in) or more of precipitation in 22 years, most in 1922 with 14.
  • Williston 5SW: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1944 with 6.
  • Williston 5SW: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1924 with 2.
  • Williston 5SW: days with 10 cm (3.9 in) or more of snowfall in 5 years, most in 1922 with 3.
  • 4 fixed thresholds have at least one qualifying day at Williston 5SW.
22 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Williston 5SW Days per year at Williston 5SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1922. 0510151914: 81915: 81916: 121917: 61918: 81919: 111920: 81921: 101922: 141923: 121924: 101925: 111926: 91927: 121940: 111941: 131942: 91943: 141944: 121945: 101946: 121947: 1219141917192019231926194119441947
Days per year at Williston 5SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1922.
Days with 10 mm (0.39 in) or more of precipitation per year at Williston 5SW
YearDaysDecade average
191488.8
191588.8
1916128.8
191768.8
191888.8
1919118.8
1920810.8
19211010.8
19221410.8
19231210.8
19241010.8
19251110.8
1926910.8
19271210.8
19401111.6
19411311.6
1942911.6
19431411.6
19441211.6
19451011.6
19461211.6
19471211.6
First to last qualifying date each year at Williston 5SW For each year, a bar from the first to the last day at Williston 5SW meeting 10 mm (0.39 in). 1914: 4 June 1914 to 24 August 19141915: 16 May 1915 to 8 November 19151916: 24 March 1916 to 26 December 19161917: 26 February 1917 to 24 December 19171918: 16 April 1918 to 30 December 19181919: 3 March 1919 to 31 October 19191920: 16 March 1920 to 23 October 19201921: 6 March 1921 to 10 September 19211922: 10 April 1922 to 6 November 19221923: 14 April 1923 to 11 October 19231924: 6 May 1924 to 12 October 19241925: 18 April 1925 to 7 October 19251926: 31 January 1926 to 23 December 19261927: 17 April 1927 to 30 October 19271940: 5 May 1940 to 9 November 19401941: 21 March 1941 to 18 November 19411942: 22 February 1942 to 22 September 19421943: 15 January 1943 to 20 October 19431944: 5 March 1944 to 13 November 19441945: 26 March 1945 to 7 December 19451946: 30 May 1946 to 7 October 19461947: 4 April 1947 to 12 August 194719141917192019231926194119441947JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Williston 5SW meeting 10 mm (0.39 in).
First to last qualifying date each year at Williston 5SW
YearFirst dateLast date
19141914-06-041914-08-24
19151915-05-161915-11-08
19161916-03-241916-12-26
19171917-02-261917-12-24
19181918-04-161918-12-30
19191919-03-031919-10-31
19201920-03-161920-10-23
19211921-03-061921-09-10
19221922-04-101922-11-06
19231923-04-141923-10-11
19241924-05-061924-10-12
19251925-04-181925-10-07
19261926-01-311926-12-23
19271927-04-171927-10-30
19401940-05-051940-11-09
19411941-03-211941-11-18
19421942-02-221942-09-22
19431943-01-151943-10-20
19441944-03-051944-11-13
19451945-03-261945-12-07
19461946-05-301946-10-07
19471947-04-041947-08-12

Every Fixed Threshold

Fixed thresholds at Williston 5SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2214192212
25 mm (0.98 in): Days with 25 mm or more rain19619443
50 mm (1.97 in): Days with 50 mm or more rain7219241
10 cm (3.9 in): Days with 10 cm or more snowfall5319221

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

  • Data for Williston 5SW 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). Threshold counts are computed by this site.

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