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Built 2026-10-19 (19 October 2026)

Alyeska Threshold Days by Year (USC00500243)

14 fixed thresholds counted per year at Alyeska (USC00500243): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alyeska Thresholds

  • Alyeska: days with 10 cm (3.9 in) or more of snowfall in 49 years, most in 1999 with 41.
  • Alyeska: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 2001 with 71.
  • Alyeska: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 2002 with 25.
  • Alyeska: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1988 with 8.
  • 14 fixed thresholds have at least one qualifying day at Alyeska.
44 years with a qualifying day
Nights at or below 0 C (32 F) per year at Alyeska Days per year at Alyeska with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 215 in 1992. 01002003001970: 2001982: 2001983: 1911984: 1991985: 2011986: 1821987: 1881988: 1871989: 1801990: 1971991: 1801992: 2151993: 1681994: 1801995: 1561996: 2071997: 1701998: 1851999: 1932000: 1932001: 1982002: 1632003: 1512004: 1472005: 1572006: 1792007: 1762008: 1862009: 1732010: 1772011: 1872012: 1862013: 1842014: 1542015: 1462016: 1352017: 1712018: 1542019: 1442020: 1852021: 1842022: 1742023: 1852024: 164197019861991199620012006201120162021
Days per year at Alyeska with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 215 in 1992.
Nights at or below 0 C (32 F) per year at Alyeska
YearDaysDecade average
1970200200
1982200191
1983191191
1984199191
1985201191
1986182191
1987188191
1988187191
1989180191
1990197185.1
1991180185.1
1992215185.1
1993168185.1
1994180185.1
1995156185.1
1996207185.1
1997170185.1
1998185185.1
1999193185.1
2000193172.3
2001198172.3
2002163172.3
2003151172.3
2004147172.3
2005157172.3
2006179172.3
2007176172.3
2008186172.3
2009173172.3
2010177163.8
2011187163.8
2012186163.8
2013184163.8
2014154163.8
2015146163.8
2016135163.8
2017171163.8
2018154163.8
2019144163.8
2020185178.4
2021184178.4
2022174178.4
2023185178.4
2024164178.4
First to last qualifying date each year at Alyeska For each year, a bar from the first to the last day at Alyeska meeting 0 C (32 F). 1970: 1 January 1970 to 31 December 19701982: 1 January 1982 to 31 December 19821983: 1 January 1983 to 31 December 19831984: 1 January 1984 to 31 December 19841985: 3 January 1985 to 31 December 19851986: 1 January 1986 to 31 December 19861987: 1 January 1987 to 31 December 19871988: 1 January 1988 to 31 December 19881989: 1 January 1989 to 31 December 19891990: 1 January 1990 to 31 December 19901991: 1 January 1991 to 31 December 19911992: 2 January 1992 to 31 December 19921993: 1 January 1993 to 31 December 19931994: 1 January 1994 to 31 December 19941995: 1 January 1995 to 29 December 19951996: 2 January 1996 to 31 December 19961997: 1 January 1997 to 31 December 19971998: 1 January 1998 to 31 December 19981999: 1 January 1999 to 31 December 19992000: 1 January 2000 to 28 December 20002001: 1 January 2001 to 29 December 20012002: 2 January 2002 to 31 December 20022003: 1 January 2003 to 31 December 20032004: 1 January 2004 to 31 December 20042005: 1 January 2005 to 31 December 20052006: 3 January 2006 to 31 December 20062007: 1 January 2007 to 31 December 20072008: 2 January 2008 to 31 December 20082009: 1 January 2009 to 31 December 20092010: 1 January 2010 to 31 December 20102011: 6 January 2011 to 31 December 20112012: 1 January 2012 to 26 December 20122013: 8 January 2013 to 31 December 20132014: 1 January 2014 to 29 December 20142015: 1 January 2015 to 26 December 20152016: 1 January 2016 to 31 December 20162017: 1 January 2017 to 31 December 20172018: 1 January 2018 to 31 December 20182019: 1 January 2019 to 30 December 20192020: 1 January 2020 to 31 December 20202021: 1 January 2021 to 31 December 20212022: 1 January 2022 to 31 December 20222023: 1 January 2023 to 31 December 20232024: 1 January 2024 to 31 December 202419701987199319992005201120172023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alyeska meeting 0 C (32 F).
First to last qualifying date each year at Alyeska
YearFirst dateLast date
19701970-01-011970-12-31
19821982-01-011982-12-31
19831983-01-011983-12-31
19841984-01-011984-12-31
19851985-01-031985-12-31
19861986-01-011986-12-31
19871987-01-011987-12-31
19881988-01-011988-12-31
19891989-01-011989-12-31
19901990-01-011990-12-31
19911991-01-011991-12-31
19921992-01-021992-12-31
19931993-01-011993-12-31
19941994-01-011994-12-31
19951995-01-011995-12-29
19961996-01-021996-12-31
19971997-01-011997-12-31
19981998-01-011998-12-31
19991999-01-011999-12-31
20002000-01-012000-12-28
20012001-01-012001-12-29
20022002-01-022002-12-31
20032003-01-012003-12-31
20042004-01-012004-12-31
20052005-01-012005-12-31
20062006-01-032006-12-31
20072007-01-012007-12-31
20082008-01-022008-12-31
20092009-01-012009-12-31
20102010-01-012010-12-31
20112011-01-062011-12-31
20122012-01-012012-12-26
20132013-01-082013-12-31
20142014-01-012014-12-29
20152015-01-012015-12-26
20162016-01-012016-12-31
20172017-01-012017-12-31
20182018-01-012018-12-31
20192019-01-012019-12-30
20202020-01-012020-12-31
20212021-01-012021-12-31
20222022-01-012022-12-31
20232023-01-012023-12-31
20242024-01-012024-12-31

Every Fixed Threshold

Fixed thresholds at Alyeska
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2220042
0 C (32 F): Ice days (max44106199659
0 C (32 F): Frost days (min442151992164
-10 C (14 F): Days with min4487201244
-20 C (-4 F): Days with min382819906
-30 C (-22 F): Days with min2319892
10 mm (0.39 in): Days with 10 mm or more rain4871200139
25 mm (0.98 in): Days with 25 mm or more rain482520026
50 mm (1.97 in): Days with 50 mm or more rain45819881
100 mm (3.94 in): Days with 100 mm or more rain11219952
200 mm (7.87 in): Days with 200 mm or more rain1120211
10 cm (3.9 in): Days with 10 cm or more snowfall494119996
25 cm (9.8 in): Days with 25 cm or more snowfall41919944
50 cm (19.7 in): Days with 50 cm or more snowfall16320001

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2004.

Download the Data

  • Data for Alyeska 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 (2026-10-12).