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Built 2026-10-19 (19 October 2026)

Alpine Threshold Days by Year (USC00420061)

15 fixed thresholds counted per year at Alpine (USC00420061): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alpine Thresholds

  • Alpine: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 1995 with 24.
  • Alpine: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1905 with 5.
  • Alpine: days with 10 cm (3.9 in) or more of snowfall in 57 years, most in 1929 with 14.
  • Alpine: nights with a minimum temperature at or below 0 C (32 F) in 46 years, most in 1976 with 187.
  • 15 fixed thresholds have at least one qualifying day at Alpine.
35 years with a qualifying day
Days at or above 30 C (86 F) per year at Alpine Days per year at Alpine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 1988. 0501001501975: 441976: 641977: 841978: 691979: 851980: 721981: 831983: 701984: 701985: 711986: 841987: 771988: 1031989: 831994: 871995: 471996: 712004: 452009: 472011: 642012: 762013: 772014: 642015: 712016: 782017: 822018: 872019: 682020: 902021: 812022: 852023: 532024: 802025: 812026: 85197519791984198819962012201620202024
Days per year at Alpine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 103 in 1988.
Days at or above 30 C (86 F) per year at Alpine
YearDaysDecade average
19754469.2
19766469.2
19778469.2
19786969.2
19798569.2
19807279.2
19818379.2
19837079.2
19847079.2
19857179.2
19868479.2
19877779.2
198810379.2
19898379.2
19948768.3
19954768.3
19967168.3
20044546
20094746
20116474.1
20127674.1
20137774.1
20146474.1
20157174.1
20167874.1
20178274.1
20188774.1
20196874.1
20209079.3
20218179.3
20228579.3
20235379.3
20248079.3
20258179.3
20268579.3
First to last qualifying date each year at Alpine For each year, a bar from the first to the last day at Alpine meeting 30 C (86 F). 1975: 13 June 1975 to 7 September 19751976: 14 May 1976 to 6 September 19761977: 31 May 1977 to 10 September 19771978: 9 June 1978 to 7 September 19781979: 22 May 1979 to 7 October 19791980: 21 May 1980 to 18 September 19801981: 5 June 1981 to 19 September 19811983: 26 May 1983 to 20 September 19831984: 13 May 1984 to 19 September 19841985: 2 May 1985 to 4 September 19851986: 19 May 1986 to 8 September 19861987: 24 April 1987 to 25 September 19871988: 12 May 1988 to 3 October 19881989: 20 April 1989 to 29 September 19891994: 19 April 1994 to 28 September 19941995: 12 June 1995 to 16 September 19951996: 13 May 1996 to 10 September 19962004: 3 June 2004 to 11 September 20042009: 18 May 2009 to 1 September 20092011: 5 June 2011 to 30 September 20112012: 15 May 2012 to 22 September 20122013: 13 May 2013 to 7 September 20132014: 27 May 2014 to 26 September 20142015: 31 May 2015 to 26 September 20152016: 4 June 2016 to 20 September 20162017: 3 June 2017 to 12 September 20172018: 4 June 2018 to 18 September 20182019: 25 June 2019 to 15 September 20192020: 28 May 2020 to 18 September 20202021: 3 June 2021 to 16 September 20212022: 26 May 2022 to 13 September 20222023: 6 June 2023 to 9 September 20232024: 6 June 2024 to 29 September 20242025: 9 May 2025 to 10 September 20252026: 25 March 2026 to 13 September 20261975198019861995201220172022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alpine meeting 30 C (86 F).
First to last qualifying date each year at Alpine
YearFirst dateLast date
19751975-06-131975-09-07
19761976-05-141976-09-06
19771977-05-311977-09-10
19781978-06-091978-09-07
19791979-05-221979-10-07
19801980-05-211980-09-18
19811981-06-051981-09-19
19831983-05-261983-09-20
19841984-05-131984-09-19
19851985-05-021985-09-04
19861986-05-191986-09-08
19871987-04-241987-09-25
19881988-05-121988-10-03
19891989-04-201989-09-29
19941994-04-191994-09-28
19951995-06-121995-09-16
19961996-05-131996-09-10
20042004-06-032004-09-11
20092009-05-182009-09-01
20112011-06-052011-09-30
20122012-05-152012-09-22
20132013-05-132013-09-07
20142014-05-272014-09-26
20152015-05-312015-09-26
20162016-06-042016-09-20
20172017-06-032017-09-12
20182018-06-042018-09-18
20192019-06-252019-09-15
20202020-05-282020-09-18
20212021-06-032021-09-16
20222022-05-262022-09-13
20232023-06-062023-09-09
20242024-06-062024-09-29
20252025-05-092025-09-10
20262026-03-252026-09-13

Every Fixed Threshold

Fixed thresholds at Alpine
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days35103198885
35 C (95 F): Days3342198825
40 C (104 F): Days3219791
90 F (32.2 C): Days3581198861
100 F (37.8 C): Days131319899
0 C (32 F): Ice days (max354419851
0 C (32 F): Frost days (min46187197659
-10 C (14 F): Days with min465919852
-20 C (-4 F): Days with min13919791
20 C (68 F): Tropical nights (min265201811
10 mm (0.39 in): Days with 10 mm or more rain10724199514
25 mm (0.98 in): Days with 25 mm or more rain80519051
50 mm (1.97 in): Days with 50 mm or more rain3119051
10 cm (3.9 in): Days with 10 cm or more snowfall571419291
25 cm (9.8 in): Days with 25 cm or more snowfall22319181

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

  • Data for Alpine 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).