Daily records
Page built 2026-10-15
Data as of 2026-10-14
Search
Built 2026-10-15 (15 October 2026)

Williams Lake Threshold Days by Year

15 fixed thresholds counted per year at Williams Lake (CA001098939): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williams Lake Thresholds

  • Williams Lake: days with 10 mm (0.39 in) or more of precipitation in 11 years, most in 1937 with 10.
  • Williams Lake: days with 10 cm (3.9 in) or more of snowfall in 8 years, most in 1938 with 4.
  • Williams Lake: days with a maximum temperature at or above 30 C (86 F) in 7 years, most in 1946 with 30.
  • Williams Lake: days with a maximum temperature at or above 90 F (32.2 C) in 7 years, most in 1941 with 17.
  • 15 fixed thresholds have at least one qualifying day at Williams Lake.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Williams Lake Days per year at Williams Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1946. 01020301939: 211940: 131941: 251943: 71944: 181945: 221946: 301939194019411943194419451946
Days per year at Williams Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1946.
Days at or above 30 C (86 F) per year at Williams Lake
YearDaysDecade average
19392121
19401319.2
19412519.2
1943719.2
19441819.2
19452219.2
19463019.2
First to last qualifying date each year at Williams Lake For each year, a bar from the first to the last day at Williams Lake meeting 30 C (86 F). 1939: 14 May 1939 to 25 August 19391940: 22 May 1940 to 10 September 19401941: 11 June 1941 to 22 August 19411943: 20 July 1943 to 25 September 19431944: 9 June 1944 to 12 September 19441945: 28 May 1945 to 26 August 19451946: 3 May 1946 to 10 September 19461939194019411943194419451946JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Williams Lake meeting 30 C (86 F).
First to last qualifying date each year at Williams Lake
YearFirst dateLast date
19391939-05-141939-08-25
19401940-05-221940-09-10
19411941-06-111941-08-22
19431943-07-201943-09-25
19441944-06-091944-09-12
19451945-05-281945-08-26
19461946-05-031946-09-10

Every Fixed Threshold

Fixed thresholds at Williams Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days730194630
35 C (95 F): Days5519412
40 C (104 F): Days1219412
90 F (32.2 C): Days717194115
100 F (37.8 C): Days1319413
0 C (32 F): Ice days (max764194556
0 C (32 F): Frost days (min71911945189
-10 C (14 F): Days with min766194666
-20 C (-4 F): Days with min714194614
-30 C (-22 F): Days with min3419431
-40 C (-40 F): Days with min1219432
10 mm (0.39 in): Days with 10 mm or more rain111019373
25 mm (0.98 in): Days with 25 mm or more rain5119361
50 mm (1.97 in): Days with 50 mm or more rain1119451
10 cm (3.9 in): Days with 10 cm or more snowfall8419381

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Williams Lake 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 (2026-10-14).