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Built 2026-10-19 (19 October 2026)

Bortnan_A Threshold Days by Year (SWE00139888)

10 fixed thresholds counted per year at Bortnan_A (SWE00139888): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bortnan_A Thresholds

  • Bortnan_A: days with a maximum temperature at or below 0 C (32 F) in 31 years, most in 2010 with 125.
  • Bortnan_A: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 2008 with 252.
  • Bortnan_A: nights with a minimum temperature at or below -10 C (14 F) in 31 years, most in 2010 with 120.
  • Bortnan_A: nights with a minimum temperature at or below -20 C (-4 F) in 31 years, most in 2010 with 60.
  • 10 fixed thresholds have at least one qualifying day at Bortnan_A.
31 years with a qualifying day
Nights at or below 0 C (32 F) per year at Bortnan_A Days per year at Bortnan_A with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 252 in 2008. 01002003001996: 2491997: 2351998: 2311999: 2342000: 2162001: 2302002: 2292003: 2422004: 2232005: 2332006: 2102007: 2412008: 2522009: 2442010: 2422011: 2252012: 2402013: 2262014: 2212015: 2382016: 2362017: 2332018: 2362019: 2352020: 2242021: 2192022: 2262023: 2282024: 2172025: 1962026: 13219962000200420082012201620202024
Days per year at Bortnan_A with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 252 in 2008.
Nights at or below 0 C (32 F) per year at Bortnan_A
YearDaysDecade average
1996249237.3
1997235237.3
1998231237.3
1999234237.3
2000216232
2001230232
2002229232
2003242232
2004223232
2005233232
2006210232
2007241232
2008252232
2009244232
2010242233.2
2011225233.2
2012240233.2
2013226233.2
2014221233.2
2015238233.2
2016236233.2
2017233233.2
2018236233.2
2019235233.2
2020224206
2021219206
2022226206
2023228206
2024217206
2025196206
2026132206
First to last qualifying date each year at Bortnan_A For each year, a bar from the first to the last day at Bortnan_A meeting 0 C (32 F). 1996: 1 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 31 December 20002001: 1 January 2001 to 31 December 20012002: 1 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: 1 January 2006 to 31 December 20062007: 1 January 2007 to 31 December 20072008: 1 January 2008 to 31 December 20082009: 1 January 2009 to 31 December 20092010: 1 January 2010 to 31 December 20102011: 1 January 2011 to 31 December 20112012: 1 January 2012 to 31 December 20122013: 1 January 2013 to 31 December 20132014: 1 January 2014 to 31 December 20142015: 1 January 2015 to 31 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 31 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 20242025: 1 January 2025 to 31 December 20252026: 1 January 2026 to 21 August 202619962000200420082012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Bortnan_A meeting 0 C (32 F).
First to last qualifying date each year at Bortnan_A
YearFirst dateLast date
19961996-01-011996-12-31
19971997-01-011997-12-31
19981998-01-011998-12-31
19991999-01-011999-12-31
20002000-01-012000-12-31
20012001-01-012001-12-31
20022002-01-012002-12-31
20032003-01-012003-12-31
20042004-01-012004-12-31
20052005-01-012005-12-31
20062006-01-012006-12-31
20072007-01-012007-12-31
20082008-01-012008-12-31
20092009-01-012009-12-31
20102010-01-012010-12-31
20112011-01-012011-12-31
20122012-01-012012-12-31
20132013-01-012013-12-31
20142014-01-012014-12-31
20152015-01-012015-12-31
20162016-01-012016-12-31
20172017-01-012017-12-31
20182018-01-012018-12-31
20192019-01-012019-12-31
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
20252025-01-012025-12-31
20262026-01-012026-08-21

Every Fixed Threshold

Fixed thresholds at Bortnan_A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days10n/a1
0 C (32 F): Ice days (max31125201057
0 C (32 F): Frost days (min312522008132
-10 C (14 F): Days with min31120201055
-20 C (-4 F): Days with min3160201026
-30 C (-22 F): Days with min261820109
-40 C (-40 F): Days with min1120011
10 mm (0.39 in): Days with 10 mm or more rain3119200011
25 mm (0.98 in): Days with 25 mm or more rain20320211
50 mm (1.97 in): Days with 50 mm or more rain1120231

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2026.

Download the Data

  • Data for Bortnan_A 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).