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Built 2026-10-19 (19 October 2026)

Swan Lake Threshold Days by Year (USC00228591)

7 fixed thresholds counted per year at Swan Lake (USC00228591): 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 10 mm (0.39 in) or more of precipitation in 44 years, most in 1974 with 66.
  • Swan Lake: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1957 with 35.
  • Swan Lake: days with 50 mm (1.97 in) or more of precipitation in 44 years, most in 1991 with 14.
  • Swan Lake: days with 100 mm (3.94 in) or more of precipitation in 19 years, most in 1958 with 2.
  • 7 fixed thresholds have at least one qualifying day at Swan Lake.
44 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Swan Lake Days per year at Swan Lake with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 66 in 1974. 0204060801948: 431949: 451950: 391951: 351952: 271953: 361954: 291955: 421956: 281957: 621958: 521959: 411960: 351961: 561962: 391963: 301964: 431965: 261966: 311967: 371968: 431969: 351970: 451971: 451972: 421973: 551974: 661975: 521976: 321977: 341978: 321985: 341986: 331987: 401988: 331989: 521990: 481991: 551992: 431993: 391994: 461996: 381997: 561999: 27194819531958196319681973197819891994
Days per year at Swan Lake with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 66 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Swan Lake
YearDaysDecade average
19484344
19494544
19503939.1
19513539.1
19522739.1
19533639.1
19542939.1
19554239.1
19562839.1
19576239.1
19585239.1
19594139.1
19603537.5
19615637.5
19623937.5
19633037.5
19644337.5
19652637.5
19663137.5
19673737.5
19684337.5
19693537.5
19704544.8
19714544.8
19724244.8
19735544.8
19746644.8
19755244.8
19763244.8
19773444.8
19783244.8
19853438.4
19863338.4
19874038.4
19883338.4
19895238.4
19904844
19915544
19924344
19933944
19944644
19963844
19975644
19992744
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 10 mm (0.39 in). 1948: 5 February 1948 to 29 December 19481949: 3 January 1949 to 22 December 19491950: 5 January 1950 to 6 December 19501951: 2 January 1951 to 21 December 19511952: 10 January 1952 to 31 December 19521953: 23 January 1953 to 9 December 19531954: 10 January 1954 to 29 December 19541955: 10 January 1955 to 18 December 19551956: 24 January 1956 to 23 December 19561957: 4 January 1957 to 7 December 19571958: 1 January 1958 to 27 December 19581959: 8 January 1959 to 19 December 19591960: 2 January 1960 to 30 December 19601961: 1 January 1961 to 31 December 19611962: 1 January 1962 to 29 December 19621963: 30 January 1963 to 23 December 19631964: 6 January 1964 to 17 December 19641965: 3 January 1965 to 11 December 19651966: 2 January 1966 to 31 December 19661967: 14 January 1967 to 31 December 19671968: 4 January 1968 to 28 December 19681969: 22 January 1969 to 30 December 19691970: 29 January 1970 to 31 December 19701971: 3 January 1971 to 15 December 19711972: 2 January 1972 to 31 December 19721973: 4 January 1973 to 26 December 19731974: 3 January 1974 to 30 December 19741975: 3 January 1975 to 7 December 19751976: 3 January 1976 to 25 December 19761977: 7 January 1977 to 14 December 19771978: 8 January 1978 to 27 November 19781985: 16 January 1985 to 12 December 19851986: 19 March 1986 to 23 December 19861987: 4 January 1987 to 28 December 19871988: 7 January 1988 to 28 December 19881989: 1 January 1989 to 31 December 19891990: 4 January 1990 to 30 December 19901991: 11 January 1991 to 23 December 19911992: 2 January 1992 to 23 December 19921993: 5 January 1993 to 28 December 19931994: 7 January 1994 to 28 November 19941996: 2 January 1996 to 18 December 19961997: 5 January 1997 to 24 December 19971999: 1 January 1999 to 1 November 199919481954196019661972197819901997JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Swan Lake meeting 10 mm (0.39 in).
First to last qualifying date each year at Swan Lake
YearFirst dateLast date
19481948-02-051948-12-29
19491949-01-031949-12-22
19501950-01-051950-12-06
19511951-01-021951-12-21
19521952-01-101952-12-31
19531953-01-231953-12-09
19541954-01-101954-12-29
19551955-01-101955-12-18
19561956-01-241956-12-23
19571957-01-041957-12-07
19581958-01-011958-12-27
19591959-01-081959-12-19
19601960-01-021960-12-30
19611961-01-011961-12-31
19621962-01-011962-12-29
19631963-01-301963-12-23
19641964-01-061964-12-17
19651965-01-031965-12-11
19661966-01-021966-12-31
19671967-01-141967-12-31
19681968-01-041968-12-28
19691969-01-221969-12-30
19701970-01-291970-12-31
19711971-01-031971-12-15
19721972-01-021972-12-31
19731973-01-041973-12-26
19741974-01-031974-12-30
19751975-01-031975-12-07
19761976-01-031976-12-25
19771977-01-071977-12-14
19781978-01-081978-11-27
19851985-01-161985-12-12
19861986-03-191986-12-23
19871987-01-041987-12-28
19881988-01-071988-12-28
19891989-01-011989-12-31
19901990-01-041990-12-30
19911991-01-111991-12-23
19921992-01-021992-12-23
19931993-01-051993-12-28
19941994-01-071994-11-28
19961996-01-021996-12-18
19971997-01-051997-12-24
19991999-01-011999-11-01

Every Fixed Threshold

Fixed thresholds at Swan Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4466197427
25 mm (0.98 in): Days with 25 mm or more rain443519576
50 mm (1.97 in): Days with 50 mm or more rain441419911
100 mm (3.94 in): Days with 100 mm or more rain19219581
200 mm (7.87 in): Days with 200 mm or more rain1119581
10 cm (3.9 in): Days with 10 cm or more snowfall3119681
25 cm (9.8 in): Days with 25 cm or more snowfall1119681

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

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 (2025-12-31).