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Data as of 2026-10-16
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Built 2026-10-17 (17 October 2026)

Swan Lake Threshold Days by Year

16 fixed thresholds counted per year at Swan Lake (CA005012799): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Swan Lake Thresholds

  • Swan Lake: days with a maximum temperature at or above 30 C (86 F) in 9 years, most in 1920 with 26.
  • Swan Lake: days with a maximum temperature at or below 0 C (32 F) in 9 years, most in 1919 with 139.
  • Swan Lake: nights with a minimum temperature at or below 0 C (32 F) in 9 years, most in 1916 with 209.
  • Swan Lake: nights with a minimum temperature at or below -10 C (14 F) in 9 years, most in 1919 with 134.
  • 16 fixed thresholds have at least one qualifying day at Swan Lake.
9 years with a qualifying day
Days at or above 30 C (86 F) per year at Swan Lake Days per year at Swan Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1920. 01020301915: 141916: 91918: 61919: 171920: 261921: 111926: 71927: 21928: 6191519161918191919201921192619271928
Days per year at Swan Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1920.
Days at or above 30 C (86 F) per year at Swan Lake
YearDaysDecade average
19151411.5
1916911.5
1918611.5
19191711.5
19202610.4
19211110.4
1926710.4
1927210.4
1928610.4
First to last qualifying date each year at Swan Lake For each year, a bar from the first to the last day at Swan Lake meeting 30 C (86 F). 1915: 13 July 1915 to 7 September 19151916: 6 July 1916 to 19 August 19161918: 5 May 1918 to 4 August 19181919: 28 May 1919 to 20 August 19191920: 8 June 1920 to 7 October 19201921: 28 May 1921 to 2 September 19211926: 5 May 1926 to 26 August 19261927: 4 September 1927 to 13 September 19271928: 22 May 1928 to 6 September 192819151918192019261928JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Swan Lake meeting 30 C (86 F).
First to last qualifying date each year at Swan Lake
YearFirst dateLast date
19151915-07-131915-09-07
19161916-07-061916-08-19
19181918-05-051918-08-04
19191919-05-281919-08-20
19201920-06-081920-10-07
19211921-05-281921-09-02
19261926-05-051926-08-26
19271927-09-041927-09-13
19281928-05-221928-09-06

Every Fixed Threshold

Fixed thresholds at Swan Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days92619206
35 C (95 F): Days4419191
90 F (32.2 C): Days8919203
0 C (32 F): Ice days (max91391919108
0 C (32 F): Frost days (min92091916204
-10 C (14 F): Days with min9134191990
-20 C (-4 F): Days with min979191629
-30 C (-22 F): Days with min93819162
-40 C (-40 F): Days with min2219162
20 C (68 F): Tropical nights (min2319163
10 mm (0.39 in): Days with 10 mm or more rain91819168
25 mm (0.98 in): Days with 25 mm or more rain9519162
50 mm (1.97 in): Days with 50 mm or more rain4119201
100 mm (3.94 in): Days with 100 mm or more rain2119211
10 cm (3.9 in): Days with 10 cm or more snowfall8919162
25 cm (9.8 in): Days with 25 cm or more snowfall2219161

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

  • Data for Swan 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).