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Built 2026-10-19 (19 October 2026)

St Vrain Threshold Days by Year (USC00297741)

4 fixed thresholds counted per year at St Vrain (USC00297741): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for St Vrain Thresholds

  • St Vrain: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1941 with 37.
  • St Vrain: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1941 with 13.
  • St Vrain: days with 10 cm (3.9 in) or more of snowfall in 15 years, most in 1918 with 3.
  • St Vrain: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1937 with 3.
  • 4 fixed thresholds have at least one qualifying day at St Vrain.
29 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at St Vrain Days per year at St Vrain with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1941. 0102030401913: 141914: 201915: 241916: 131917: 111918: 141919: 181920: 141921: 161922: 81923: 211924: 81925: 121926: 241927: 111928: 161929: 101930: 111931: 111932: 161933: 91934: 161935: 101936: 91937: 121940: 91941: 371943: 61944: 161913191619191922192519281931193419371943
Days per year at St Vrain with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1941.
Days with 10 mm (0.39 in) or more of precipitation per year at St Vrain
YearDaysDecade average
19131416.3
19142016.3
19152416.3
19161316.3
19171116.3
19181416.3
19191816.3
19201414
19211614
1922814
19232114
1924814
19251214
19262414
19271114
19281614
19291014
19301111.8
19311111.8
19321611.8
1933911.8
19341611.8
19351011.8
1936911.8
19371211.8
1940917
19413717
1943617
19441617
First to last qualifying date each year at St Vrain For each year, a bar from the first to the last day at St Vrain meeting 10 mm (0.39 in). 1913: 20 April 1913 to 21 December 19131914: 2 April 1914 to 24 December 19141915: 19 February 1915 to 6 December 19151916: 23 March 1916 to 31 December 19161917: 14 January 1917 to 14 September 19171918: 13 April 1918 to 22 December 19181919: 22 March 1919 to 17 September 19191920: 7 January 1920 to 4 September 19201921: 15 May 1921 to 23 September 19211922: 13 March 1922 to 12 August 19221923: 22 February 1923 to 11 December 19231924: 22 March 1924 to 28 August 19241925: 9 May 1925 to 16 October 19251926: 21 March 1926 to 5 December 19261927: 7 June 1927 to 19 September 19271928: 16 February 1928 to 12 December 19281929: 27 March 1929 to 7 August 19291930: 28 March 1930 to 11 October 19301931: 10 January 1931 to 17 December 19311932: 5 January 1932 to 15 December 19321933: 17 July 1933 to 13 September 19331934: 25 March 1934 to 21 November 19341935: 23 March 1935 to 26 November 19351936: 7 January 1936 to 28 August 19361937: 6 March 1937 to 13 December 19371940: 2 February 1940 to 17 August 19401941: 21 March 1941 to 30 October 19411943: 7 June 1943 to 27 December 19431944: 27 February 1944 to 3 December 194419131917192119251929193319371944JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at St Vrain meeting 10 mm (0.39 in).
First to last qualifying date each year at St Vrain
YearFirst dateLast date
19131913-04-201913-12-21
19141914-04-021914-12-24
19151915-02-191915-12-06
19161916-03-231916-12-31
19171917-01-141917-09-14
19181918-04-131918-12-22
19191919-03-221919-09-17
19201920-01-071920-09-04
19211921-05-151921-09-23
19221922-03-131922-08-12
19231923-02-221923-12-11
19241924-03-221924-08-28
19251925-05-091925-10-16
19261926-03-211926-12-05
19271927-06-071927-09-19
19281928-02-161928-12-12
19291929-03-271929-08-07
19301930-03-281930-10-11
19311931-01-101931-12-17
19321932-01-051932-12-15
19331933-07-171933-09-13
19341934-03-251934-11-21
19351935-03-231935-11-26
19361936-01-071936-08-28
19371937-03-061937-12-13
19401940-02-021940-08-17
19411941-03-211941-10-30
19431943-06-071943-12-27
19441944-02-271944-12-03

Every Fixed Threshold

Fixed thresholds at St Vrain
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2937194116
25 mm (0.98 in): Days with 25 mm or more rain291319416
50 mm (1.97 in): Days with 50 mm or more rain10319372
10 cm (3.9 in): Days with 10 cm or more snowfall15319182

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

  • Data for St Vrain 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).