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Built 2026-10-19 (19 October 2026)

Blewett Pass Threshold Days by Year (USS0020B02S)

12 fixed thresholds counted per year at Blewett Pass (USS0020B02S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blewett Pass Thresholds

  • Blewett Pass: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1996 with 45.
  • Blewett Pass: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1990 with 14.
  • Blewett Pass: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1998 with 31.
  • Blewett Pass: days with a maximum temperature at or below 0 C (32 F) in 37 years, most in 2022 with 83.
  • 12 fixed thresholds have at least one qualifying day at Blewett Pass.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Blewett Pass Days per year at Blewett Pass with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1998. 0102030401989: 21990: 111991: 21992: 171993: 11994: 171995: 51996: 231997: 81998: 311999: 62000: 82001: 102002: 82003: 192004: 182005: 152006: 252007: 152008: 52009: 122010: 32011: 22012: 72013: 52014: 142015: 202016: 82017: 182018: 142019: 52020: 132021: 242022: 42024: 32025: 162026: 91989199319972001200520092013201720212026
Days per year at Blewett Pass with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 31 in 1998.
Days at or above 30 C (86 F) per year at Blewett Pass
YearDaysDecade average
198922
19901112.1
1991212.1
19921712.1
1993112.1
19941712.1
1995512.1
19962312.1
1997812.1
19983112.1
1999612.1
2000813.5
20011013.5
2002813.5
20031913.5
20041813.5
20051513.5
20062513.5
20071513.5
2008513.5
20091213.5
201039.6
201129.6
201279.6
201359.6
2014149.6
2015209.6
201689.6
2017189.6
2018149.6
201959.6
20201311.5
20212411.5
2022411.5
2024311.5
20251611.5
2026911.5
First to last qualifying date each year at Blewett Pass For each year, a bar from the first to the last day at Blewett Pass meeting 30 C (86 F). 1989: 6 August 1989 to 7 August 19891990: 10 July 1990 to 12 August 19901991: 3 July 1991 to 18 August 19911992: 22 June 1992 to 18 August 19921993: 8 September 1993 to 8 September 19931994: 22 June 1994 to 13 August 19941995: 17 July 1995 to 2 September 19951996: 8 July 1996 to 29 August 19961997: 20 July 1997 to 14 August 19971998: 17 July 1998 to 7 September 19981999: 27 July 1999 to 27 August 19992000: 21 July 2000 to 23 August 20002001: 3 July 2001 to 16 August 20012002: 26 June 2002 to 14 August 20022003: 28 June 2003 to 4 September 20032004: 22 June 2004 to 20 August 20042005: 18 July 2005 to 21 August 20052006: 16 May 2006 to 6 September 20062007: 3 June 2007 to 30 August 20072008: 29 June 2008 to 17 August 20082009: 17 July 2009 to 20 August 20092010: 9 July 2010 to 17 August 20102011: 28 August 2011 to 11 September 20112012: 8 July 2012 to 17 August 20122013: 2 July 2013 to 25 July 20132014: 8 July 2014 to 11 August 20142015: 7 June 2015 to 12 September 20152016: 5 June 2016 to 20 August 20162017: 5 July 2017 to 3 September 20172018: 15 July 2018 to 16 August 20182019: 5 August 2019 to 28 August 20192020: 27 July 2020 to 11 September 20202021: 2 June 2021 to 15 August 20212022: 28 July 2022 to 31 July 20222024: 9 July 2024 to 6 September 20242025: 8 June 2025 to 4 September 20252026: 15 July 2026 to 20 August 202619891994199920042009201420192025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blewett Pass meeting 30 C (86 F).
First to last qualifying date each year at Blewett Pass
YearFirst dateLast date
19891989-08-061989-08-07
19901990-07-101990-08-12
19911991-07-031991-08-18
19921992-06-221992-08-18
19931993-09-081993-09-08
19941994-06-221994-08-13
19951995-07-171995-09-02
19961996-07-081996-08-29
19971997-07-201997-08-14
19981998-07-171998-09-07
19991999-07-271999-08-27
20002000-07-212000-08-23
20012001-07-032001-08-16
20022002-06-262002-08-14
20032003-06-282003-09-04
20042004-06-222004-08-20
20052005-07-182005-08-21
20062006-05-162006-09-06
20072007-06-032007-08-30
20082008-06-292008-08-17
20092009-07-172009-08-20
20102010-07-092010-08-17
20112011-08-282011-09-11
20122012-07-082012-08-17
20132013-07-022013-07-25
20142014-07-082014-08-11
20152015-06-072015-09-12
20162016-06-052016-08-20
20172017-07-052017-09-03
20182018-07-152018-08-16
20192019-08-052019-08-28
20202020-07-272020-09-11
20212021-06-022021-08-15
20222022-07-282022-07-31
20242024-07-092024-09-06
20252025-06-082025-09-04
20262026-07-152026-08-20

Every Fixed Threshold

Fixed thresholds at Blewett Pass
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days373119989
35 C (95 F): Days5419983
90 F (32.2 C): Days261819982
0 C (32 F): Ice days (max3783202222
0 C (32 F): Frost days (min362062022102
-10 C (14 F): Days with min363920224
-20 C (-4 F): Days with min8819905
20 C (68 F): Tropical nights (min5520215
10 mm (0.39 in): Days with 10 mm or more rain4545199615
25 mm (0.98 in): Days with 25 mm or more rain451419904
50 mm (1.97 in): Days with 50 mm or more rain20319962
100 mm (3.94 in): Days with 100 mm or more rain3120061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Blewett Pass 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).