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

Fort William Threshold Days by Year (ASN00037022)

3 fixed thresholds counted per year at Fort William (ASN00037022): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Fort William Thresholds

  • Fort William: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1920 with 21.
  • Fort William: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1916 with 6.
  • Fort William: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1936 with 3.
  • 3 fixed thresholds have at least one qualifying day at Fort William.
25 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Fort William Days per year at Fort William with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1920. 01020301916: 171917: 171918: 101919: 61920: 211921: 171922: 81923: 51924: 71926: 41929: 41930: 81931: 71932: 41936: 131937: 61942: 71943: 61945: 51946: 121947: 91948: 101949: 121951: 31952: 10191619191922192619311937194519481952
Days per year at Fort William with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1920.
Days with 10 mm (0.39 in) or more of precipitation per year at Fort William
YearDaysDecade average
19161712.5
19171712.5
19181012.5
1919612.5
1920219.4
1921179.4
192289.4
192359.4
192479.4
192649.4
192949.4
193087.6
193177.6
193247.6
1936137.6
193767.6
194278.7
194368.7
194558.7
1946128.7
194798.7
1948108.7
1949128.7
195136.5
1952106.5
First to last qualifying date each year at Fort William For each year, a bar from the first to the last day at Fort William meeting 10 mm (0.39 in). 1916: 24 January 1916 to 30 December 19161917: 18 January 1917 to 13 November 19171918: 7 January 1918 to 28 October 19181919: 21 January 1919 to 3 December 19191920: 13 January 1920 to 6 December 19201921: 3 January 1921 to 24 December 19211922: 6 January 1922 to 20 December 19221923: 17 January 1923 to 19 December 19231924: 6 January 1924 to 11 December 19241926: 24 September 1926 to 20 December 19261929: 5 January 1929 to 1 December 19291930: 2 February 1930 to 29 October 19301931: 18 January 1931 to 22 December 19311932: 15 March 1932 to 1 June 19321936: 11 January 1936 to 10 November 19361937: 1 January 1937 to 13 June 19371942: 26 May 1942 to 25 December 19421943: 4 February 1943 to 19 December 19431945: 16 January 1945 to 26 December 19451946: 13 January 1946 to 26 December 19461947: 10 February 1947 to 24 December 19471948: 13 February 1948 to 29 December 19481949: 30 January 1949 to 20 December 19491951: 22 January 1951 to 19 November 19511952: 22 January 1952 to 26 November 19521916192019241931194219471952JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Fort William meeting 10 mm (0.39 in).
First to last qualifying date each year at Fort William
YearFirst dateLast date
19161916-01-241916-12-30
19171917-01-181917-11-13
19181918-01-071918-10-28
19191919-01-211919-12-03
19201920-01-131920-12-06
19211921-01-031921-12-24
19221922-01-061922-12-20
19231923-01-171923-12-19
19241924-01-061924-12-11
19261926-09-241926-12-20
19291929-01-051929-12-01
19301930-02-021930-10-29
19311931-01-181931-12-22
19321932-03-151932-06-01
19361936-01-111936-11-10
19371937-01-011937-06-13
19421942-05-261942-12-25
19431943-02-041943-12-19
19451945-01-161945-12-26
19461946-01-131946-12-26
19471947-02-101947-12-24
19481948-02-131948-12-29
19491949-01-301949-12-20
19511951-01-221951-11-19
19521952-01-221952-11-26

Every Fixed Threshold

Fixed thresholds at Fort William
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2521192010
25 mm (0.98 in): Days with 25 mm or more rain23619164
50 mm (1.97 in): Days with 50 mm or more rain13319361

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 Fort William 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).