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Built 2026-10-19 (19 October 2026)

Mystic Lake Threshold Days by Year (USC00245961)

16 fixed thresholds counted per year at Mystic Lake (USC00245961): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mystic Lake Thresholds

  • Mystic Lake: days with a maximum temperature at or below 0 C (32 F) in 101 years, most in 1955 with 79.
  • Mystic Lake: nights with a minimum temperature at or below 0 C (32 F) in 101 years, most in 1957 with 207.
  • Mystic Lake: nights with a minimum temperature at or below -10 C (14 F) in 101 years, most in 1955 with 84.
  • Mystic Lake: nights with a minimum temperature at or below -20 C (-4 F) in 100 years, most in 1936 with 25.
  • 16 fixed thresholds have at least one qualifying day at Mystic Lake.
70 years with a qualifying day
Days at or above 30 C (86 F) per year at Mystic Lake Days per year at Mystic Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 1936. 0510151925: 31926: 31929: 21930: 11931: 51932: 41933: 111934: 61935: 81936: 151937: 61939: 21940: 51941: 21942: 21943: 21945: 31946: 21949: 51950: 31951: 11953: 11954: 51955: 41956: 11957: 21958: 11959: 11960: 31961: 51963: 21966: 11969: 31970: 41971: 11973: 21976: 11979: 31981: 21982: 21983: 31984: 31985: 71986: 41988: 121989: 71990: 101991: 31993: 11995: 21996: 61998: 32000: 32001: 12002: 42003: 42005: 52006: 82010: 12011: 22012: 52016: 12017: 12018: 42021: 22022: 42023: 12024: 22025: 12026: 81925193419421953196019731985199520052018
Days per year at Mystic Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 1936.
Days at or above 30 C (86 F) per year at Mystic Lake
YearDaysDecade average
192532.7
192632.7
192922.7
193016.4
193156.4
193246.4
1933116.4
193466.4
193586.4
1936156.4
193766.4
193926.4
194053
194123
194223
194323
194533
194623
194953
195032.1
195112.1
195312.1
195452.1
195542.1
195612.1
195722.1
195812.1
195912.1
196032.8
196152.8
196322.8
196612.8
196932.8
197042.2
197112.2
197322.2
197612.2
197932.2
198125
198225
198335
198435
198575
198645
1988125
198975
1990104.2
199134.2
199314.2
199524.2
199664.2
199834.2
200034.2
200114.2
200244.2
200344.2
200554.2
200684.2
201012.3
201122.3
201252.3
201612.3
201712.3
201842.3
202123
202243
202313
202423
202513
202683
First to last qualifying date each year at Mystic Lake For each year, a bar from the first to the last day at Mystic Lake meeting 30 C (86 F). 1925: 12 July 1925 to 15 July 19251926: 26 June 1926 to 17 July 19261929: 24 July 1929 to 14 August 19291930: 8 July 1930 to 8 July 19301931: 13 July 1931 to 24 July 19311932: 17 July 1932 to 19 August 19321933: 12 July 1933 to 30 July 19331934: 19 July 1934 to 28 August 19341935: 15 July 1935 to 14 August 19351936: 27 June 1936 to 25 July 19361937: 21 June 1937 to 14 August 19371939: 10 July 1939 to 11 July 19391940: 22 July 1940 to 13 August 19401941: 4 August 1941 to 5 August 19411942: 4 July 1942 to 6 July 19421943: 31 July 1943 to 1 August 19431945: 25 July 1945 to 28 August 19451946: 21 July 1946 to 20 August 19461949: 3 August 1949 to 21 August 19491950: 3 September 1950 to 5 September 19501951: 18 July 1951 to 18 July 19511953: 14 July 1953 to 14 July 19531954: 4 July 1954 to 31 August 19541955: 16 July 1955 to 31 August 19551956: 24 July 1956 to 24 July 19561957: 10 August 1957 to 11 August 19571958: 14 August 1958 to 14 August 19581959: 24 July 1959 to 24 July 19591960: 19 July 1960 to 22 July 19601961: 3 July 1961 to 6 August 19611963: 21 July 1963 to 22 July 19631966: 30 July 1966 to 30 July 19661969: 23 August 1969 to 25 August 19691970: 26 June 1970 to 8 August 19701971: 14 August 1971 to 14 August 19711973: 10 July 1973 to 11 July 19731976: 24 July 1976 to 24 July 19761979: 10 July 1979 to 6 August 19791981: 5 July 1981 to 6 July 19811982: 22 July 1982 to 1 August 19821983: 7 July 1983 to 7 August 19831984: 29 June 1984 to 11 August 19841985: 5 July 1985 to 25 August 19851986: 17 June 1986 to 19 August 19861988: 4 June 1988 to 31 July 19881989: 4 July 1989 to 1 August 19891990: 26 June 1990 to 9 August 19901991: 13 July 1991 to 18 July 19911993: 29 July 1993 to 29 July 19931995: 6 August 1995 to 7 August 19951996: 3 July 1996 to 24 August 19961998: 17 July 1998 to 3 September 19982000: 13 July 2000 to 15 July 20002001: 3 August 2001 to 3 August 20012002: 8 July 2002 to 14 July 20022003: 16 July 2003 to 13 August 20032005: 9 July 2005 to 16 July 20052006: 15 July 2006 to 30 July 20062010: 27 August 2010 to 27 August 20102011: 3 July 2011 to 4 July 20112012: 24 June 2012 to 29 August 20122016: 3 August 2016 to 3 August 20162017: 14 July 2017 to 14 July 20172018: 6 July 2018 to 12 August 20182021: 15 June 2021 to 27 July 20212022: 3 September 2022 to 7 September 20222023: 18 August 2023 to 18 August 20232024: 24 July 2024 to 25 July 20242025: 9 July 2025 to 9 July 20252026: 11 July 2026 to 2 August 202619251936194919591976198920022018JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mystic Lake meeting 30 C (86 F).
First to last qualifying date each year at Mystic Lake
YearFirst dateLast date
19251925-07-121925-07-15
19261926-06-261926-07-17
19291929-07-241929-08-14
19301930-07-081930-07-08
19311931-07-131931-07-24
19321932-07-171932-08-19
19331933-07-121933-07-30
19341934-07-191934-08-28
19351935-07-151935-08-14
19361936-06-271936-07-25
19371937-06-211937-08-14
19391939-07-101939-07-11
19401940-07-221940-08-13
19411941-08-041941-08-05
19421942-07-041942-07-06
19431943-07-311943-08-01
19451945-07-251945-08-28
19461946-07-211946-08-20
19491949-08-031949-08-21
19501950-09-031950-09-05
19511951-07-181951-07-18
19531953-07-141953-07-14
19541954-07-041954-08-31
19551955-07-161955-08-31
19561956-07-241956-07-24
19571957-08-101957-08-11
19581958-08-141958-08-14
19591959-07-241959-07-24
19601960-07-191960-07-22
19611961-07-031961-08-06
19631963-07-211963-07-22
19661966-07-301966-07-30
19691969-08-231969-08-25
19701970-06-261970-08-08
19711971-08-141971-08-14
19731973-07-101973-07-11
19761976-07-241976-07-24
19791979-07-101979-08-06
19811981-07-051981-07-06
19821982-07-221982-08-01
19831983-07-071983-08-07
19841984-06-291984-08-11
19851985-07-051985-08-25
19861986-06-171986-08-19
19881988-06-041988-07-31
19891989-07-041989-08-01
19901990-06-261990-08-09
19911991-07-131991-07-18
19931993-07-291993-07-29
19951995-08-061995-08-07
19961996-07-031996-08-24
19981998-07-171998-09-03
20002000-07-132000-07-15
20012001-08-032001-08-03
20022002-07-082002-07-14
20032003-07-162003-08-13
20052005-07-092005-07-16
20062006-07-152006-07-30
20102010-08-272010-08-27
20112011-07-032011-07-04
20122012-06-242012-08-29
20162016-08-032016-08-03
20172017-07-142017-07-14
20182018-07-062018-08-12
20212021-06-152021-07-27
20222022-09-032022-09-07
20232023-08-182023-08-18
20242024-07-242024-07-25
20252025-07-092025-07-09
20262026-07-112026-08-02

Every Fixed Threshold

Fixed thresholds at Mystic Lake
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days701519368
35 C (95 F): Days10n/a1
90 F (32.2 C): Days16619335
0 C (32 F): Ice days (max10179195516
0 C (32 F): Frost days (min101207195784
-10 C (14 F): Days with min10184195512
-20 C (-4 F): Days with min1002519362
-30 C (-22 F): Days with min41719362
20 C (68 F): Tropical nights (min9219311
10 mm (0.39 in): Days with 10 mm or more rain9629196714
25 mm (0.98 in): Days with 25 mm or more rain88719941
50 mm (1.97 in): Days with 50 mm or more rain20219431
100 mm (3.94 in): Days with 100 mm or more rain1119451
10 cm (3.9 in): Days with 10 cm or more snowfall9633201710
25 cm (9.8 in): Days with 25 cm or more snowfall83919831
50 cm (19.7 in): Days with 50 cm or more snowfall24219841

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1925.

Download the Data

  • Data for Mystic 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).