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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Knowlton 1 W Threshold Days by Year (USC00474282)

5 fixed thresholds counted per year at Knowlton 1 W (USC00474282): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Knowlton 1 W Thresholds

  • Knowlton 1 W: days with 10 mm (0.39 in) or more of precipitation in 15 years, most in 1942 with 31.
  • Knowlton 1 W: days with 25 mm (0.98 in) or more of precipitation in 14 years, most in 1942 with 11.
  • Knowlton 1 W: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1942 with 4.
  • Knowlton 1 W: days with 10 cm (3.9 in) or more of snowfall in 3 years, most in 1951 with 6.
  • 5 fixed thresholds have at least one qualifying day at Knowlton 1 W.
15 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Knowlton 1 W Days per year at Knowlton 1 W with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1942. 0102030401916: 231917: 221919: 271920: 261921: 191922: 261923: 221924: 241939: 181941: 251942: 311948: 181950: 201951: 291952: 1919161919192119231939194219501952
Days per year at Knowlton 1 W with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1942.
Days with 10 mm (0.39 in) or more of precipitation per year at Knowlton 1 W
YearDaysDecade average
19162324
19172224
19192724
19202623.4
19211923.4
19222623.4
19232223.4
19242423.4
19391818
19412524.7
19423124.7
19481824.7
19502022.7
19512922.7
19521922.7
First to last qualifying date each year at Knowlton 1 W For each year, a bar from the first to the last day at Knowlton 1 W meeting 10 mm (0.39 in). 1916: 27 January 1916 to 8 November 19161917: 14 March 1917 to 18 October 19171919: 7 April 1919 to 10 November 19191920: 4 March 1920 to 23 December 19201921: 4 February 1921 to 16 December 19211922: 5 January 1922 to 19 November 19221923: 14 January 1923 to 31 December 19231924: 1 January 1924 to 21 November 19241939: 5 January 1939 to 10 October 19391941: 2 January 1941 to 24 December 19411942: 16 February 1942 to 27 December 19421948: 28 February 1948 to 6 December 19481950: 14 January 1950 to 2 December 19501951: 26 February 1951 to 21 December 19511952: 15 January 1952 to 20 August 195219161919192119231939194219501952JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Knowlton 1 W meeting 10 mm (0.39 in).
First to last qualifying date each year at Knowlton 1 W
YearFirst dateLast date
19161916-01-271916-11-08
19171917-03-141917-10-18
19191919-04-071919-11-10
19201920-03-041920-12-23
19211921-02-041921-12-16
19221922-01-051922-11-19
19231923-01-141923-12-31
19241924-01-011924-11-21
19391939-01-051939-10-10
19411941-01-021941-12-24
19421942-02-161942-12-27
19481948-02-281948-12-06
19501950-01-141950-12-02
19511951-02-261951-12-21
19521952-01-151952-08-20

Every Fixed Threshold

Fixed thresholds at Knowlton 1 W
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1531194219
25 mm (0.98 in): Days with 25 mm or more rain141119424
50 mm (1.97 in): Days with 50 mm or more rain7419421
100 mm (3.94 in): Days with 100 mm or more rain1119391
10 cm (3.9 in): Days with 10 cm or more snowfall3619513

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

  • Data for Knowlton 1 W 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).