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Data as of 2026-10-15
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Built 2026-10-17 (17 October 2026)

Round Lake Alaska Threshold Days by Year

9 fixed thresholds counted per year at Round Lake Alaska (USR0000AROU): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Round Lake Alaska Thresholds

  • Round Lake Alaska: days with a maximum temperature at or below 0 C (32 F) in 27 years, most in 2001 with 175.
  • Round Lake Alaska: nights with a minimum temperature at or below 0 C (32 F) in 27 years, most in 2010 with 280.
  • Round Lake Alaska: nights with a minimum temperature at or below -10 C (14 F) in 27 years, most in 1999 with 173.
  • Round Lake Alaska: nights with a minimum temperature at or below -20 C (-4 F) in 27 years, most in 1999 with 107.
  • 9 fixed thresholds have at least one qualifying day at Round Lake Alaska.
21 years with a qualifying day
Days at or above 30 C (86 F) per year at Round Lake Alaska Days per year at Round Lake Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 2004. 0510151993: 61994: 31998: 21999: 22000: 22002: 92003: 22004: 152005: 22007: 22013: 52014: 22015: 62016: 52017: 22018: 42021: 42022: 22023: 22024: 32025: 71993199920032007201520182023
Days per year at Round Lake Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 2004.
Days at or above 30 C (86 F) per year at Round Lake Alaska
YearDaysDecade average
199363.3
199433.3
199823.3
199923.3
200025.3
200295.3
200325.3
2004155.3
200525.3
200725.3
201354
201424
201564
201654
201724
201844
202143.6
202223.6
202323.6
202433.6
202573.6
First to last qualifying date each year at Round Lake Alaska For each year, a bar from the first to the last day at Round Lake Alaska meeting 30 C (86 F). 1993: 3 June 1993 to 22 July 19931994: 13 June 1994 to 5 August 19941998: 30 June 1998 to 21 July 19981999: 13 June 1999 to 10 July 19992000: 12 June 2000 to 24 June 20002002: 21 May 2002 to 4 August 20022003: 9 July 2003 to 10 August 20032004: 6 June 2004 to 18 August 20042005: 17 June 2005 to 10 August 20052007: 3 July 2007 to 4 July 20072013: 24 June 2013 to 1 August 20132014: 5 July 2014 to 6 July 20142015: 18 June 2015 to 6 July 20152016: 16 June 2016 to 15 July 20162017: 13 July 2017 to 14 July 20172018: 21 July 2018 to 31 July 20182021: 1 July 2021 to 3 August 20212022: 30 June 2022 to 9 July 20222023: 23 July 2023 to 24 July 20232024: 30 June 2024 to 24 July 20242025: 15 June 2025 to 5 July 20251993199920032007201520182023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Round Lake Alaska meeting 30 C (86 F).
First to last qualifying date each year at Round Lake Alaska
YearFirst dateLast date
19931993-06-031993-07-22
19941994-06-131994-08-05
19981998-06-301998-07-21
19991999-06-131999-07-10
20002000-06-122000-06-24
20022002-05-212002-08-04
20032003-07-092003-08-10
20042004-06-062004-08-18
20052005-06-172005-08-10
20072007-07-032007-07-04
20132013-06-242013-08-01
20142014-07-052014-07-06
20152015-06-182015-07-06
20162016-06-162016-07-15
20172017-07-132017-07-14
20182018-07-212018-07-31
20212021-07-012021-08-03
20222022-06-302022-07-09
20232023-07-232023-07-24
20242024-06-302024-07-24
20252025-06-152025-07-05

Every Fixed Threshold

Fixed thresholds at Round Lake Alaska
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days211520047
90 F (32.2 C): Days11320043
0 C (32 F): Ice days (max27175200188
0 C (32 F): Frost days (min272802010147
-10 C (14 F): Days with min27173199997
-20 C (-4 F): Days with min27107199961
-30 C (-22 F): Days with min2746199929
-40 C (-40 F): Days with min232019996
20 C (68 F): Tropical nights (min2119931

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1993.

Download the Data

  • Data for Round Lake Alaska 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-15).