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Built 2026-10-19 (19 October 2026)

Swan Lake Threshold Days by Year (USC00248087)

16 fixed thresholds counted per year at Swan Lake (USC00248087): 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 39 years, most in 2022 with 57.
  • Swan Lake: days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 1985 with 78.
  • Swan Lake: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1965 with 223.
  • Swan Lake: nights with a minimum temperature at or below -10 C (14 F) in 39 years, most in 1985 with 69.
  • 16 fixed thresholds have at least one qualifying day at Swan Lake.
39 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 57 in 2022. 02040601964: 181965: 251966: 291967: 561968: 271969: 421970: 441973: 191974: 151975: 101976: 71977: 81978: 71979: 181981: 81982: 31985: 241997: 232000: 332001: 352002: 172003: 502004: 202005: 242006: 392007: 362008: 242009: 262010: 162011: 292018: 392019: 322020: 442021: 542022: 572023: 452024: 412025: 552026: 501964196819741978198520022006201020202024
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 57 in 2022.
Days at or above 30 C (86 F) per year at Swan Lake
YearDaysDecade average
19641832.8
19652532.8
19662932.8
19675632.8
19682732.8
19694232.8
19704416
19731916
19741516
19751016
1976716
1977816
1978716
19791816
1981811.7
1982311.7
19852411.7
19972323
20003330.4
20013530.4
20021730.4
20035030.4
20042030.4
20052430.4
20063930.4
20073630.4
20082430.4
20092630.4
20101629
20112929
20183929
20193229
20204449.4
20215449.4
20225749.4
20234549.4
20244149.4
20255549.4
20265049.4
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). 1964: 25 June 1964 to 17 August 19641965: 10 June 1965 to 19 August 19651966: 26 May 1966 to 10 September 19661967: 2 July 1967 to 29 September 19671968: 26 June 1968 to 9 August 19681969: 4 June 1969 to 13 September 19691970: 3 June 1970 to 1 September 19701973: 22 June 1973 to 21 August 19731974: 15 June 1974 to 22 August 19741975: 2 July 1975 to 27 July 19751976: 29 June 1976 to 27 July 19761977: 16 July 1977 to 19 August 19771978: 24 July 1978 to 3 September 19781979: 26 June 1979 to 17 August 19791981: 5 July 1981 to 27 August 19811982: 7 August 1982 to 10 August 19821985: 20 June 1985 to 4 August 19851997: 6 July 1997 to 3 September 19972000: 1 July 2000 to 26 August 20002001: 13 May 2001 to 26 September 20012002: 27 June 2002 to 14 August 20022003: 25 May 2003 to 7 September 20032004: 24 June 2004 to 16 August 20042005: 22 June 2005 to 29 August 20052006: 17 May 2006 to 7 September 20062007: 4 June 2007 to 26 August 20072008: 18 May 2008 to 25 August 20082009: 3 July 2009 to 25 September 20092010: 29 June 2010 to 27 August 20102011: 29 June 2011 to 14 September 20112018: 16 May 2018 to 8 September 20182019: 3 June 2019 to 6 September 20192020: 30 May 2020 to 13 September 20202021: 3 June 2021 to 10 September 20212022: 28 June 2022 to 29 September 20222023: 1 May 2023 to 17 September 20232024: 7 July 2024 to 26 September 20242025: 29 May 2025 to 30 September 20252026: 26 May 2026 to 2 September 202619641969197619822002200720182023JanFebMarAprMayJunJulAugSepOctNovDec
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
19641964-06-251964-08-17
19651965-06-101965-08-19
19661966-05-261966-09-10
19671967-07-021967-09-29
19681968-06-261968-08-09
19691969-06-041969-09-13
19701970-06-031970-09-01
19731973-06-221973-08-21
19741974-06-151974-08-22
19751975-07-021975-07-27
19761976-06-291976-07-27
19771977-07-161977-08-19
19781978-07-241978-09-03
19791979-06-261979-08-17
19811981-07-051981-08-27
19821982-08-071982-08-10
19851985-06-201985-08-04
19971997-07-061997-09-03
20002000-07-012000-08-26
20012001-05-132001-09-26
20022002-06-272002-08-14
20032003-05-252003-09-07
20042004-06-242004-08-16
20052005-06-222005-08-29
20062006-05-172006-09-07
20072007-06-042007-08-26
20082008-05-182008-08-25
20092009-07-032009-09-25
20102010-06-292010-08-27
20112011-06-292011-09-14
20182018-05-162018-09-08
20192019-06-032019-09-06
20202020-05-302020-09-13
20212021-06-032021-09-10
20222022-06-282022-09-29
20232023-05-012023-09-17
20242024-07-072024-09-26
20252025-05-292025-09-30
20262026-05-262026-09-02

Every Fixed Threshold

Fixed thresholds at Swan Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3957202250
35 C (95 F): Days2618196718
40 C (104 F): Days1120181
90 F (32.2 C): Days3842200330
100 F (37.8 C): Days9319692
0 C (32 F): Ice days (max3978198511
0 C (32 F): Frost days (min392231965104
-10 C (14 F): Days with min396919856
-20 C (-4 F): Days with min382019795
-30 C (-22 F): Days with min12719791
-40 C (-40 F): Days with min1119681
10 mm (0.39 in): Days with 10 mm or more rain2930197015
25 mm (0.98 in): Days with 25 mm or more rain23719855
50 mm (1.97 in): Days with 50 mm or more rain6219852
10 cm (3.9 in): Days with 10 cm or more snowfall312219756
25 cm (9.8 in): Days with 25 cm or more snowfall14219701

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).