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Built 2026-10-19 (19 October 2026)

Lolo Pass Threshold Days by Year (USS0014C05S)

12 fixed thresholds counted per year at Lolo Pass (USS0014C05S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lolo Pass Thresholds

  • Lolo Pass: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1997 with 63.
  • Lolo Pass: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1995 with 12.
  • Lolo Pass: days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 1997 with 121.
  • Lolo Pass: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2007 with 23.
  • 12 fixed thresholds have at least one qualifying day at Lolo Pass.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Lolo Pass Days per year at Lolo Pass with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 23 in 2007. 01020301986: 121987: 91990: 171991: 41992: 41994: 81996: 71997: 11998: 161999: 52000: 72001: 72002: 72003: 202004: 222005: 62006: 92007: 232008: 82009: 32010: 12011: 42012: 102013: 92014: 22015: 172016: 22017: 182018: 62019: 82020: 92021: 162022: 182023: 132024: 152025: 42026: 71986199219982002200620102014201820222026
Days per year at Lolo Pass with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 23 in 2007.
Days at or above 30 C (86 F) per year at Lolo Pass
YearDaysDecade average
19861210.5
1987910.5
1990177.8
199147.8
199247.8
199487.8
199677.8
199717.8
1998167.8
199957.8
2000711.2
2001711.2
2002711.2
20032011.2
20042211.2
2005611.2
2006911.2
20072311.2
2008811.2
2009311.2
201017.7
201147.7
2012107.7
201397.7
201427.7
2015177.7
201627.7
2017187.7
201867.7
201987.7
2020911.7
20211611.7
20221811.7
20231311.7
20241511.7
2025411.7
2026711.7
First to last qualifying date each year at Lolo Pass For each year, a bar from the first to the last day at Lolo Pass meeting 30 C (86 F). 1986: 26 May 1986 to 28 August 19861987: 14 June 1987 to 23 September 19871990: 22 June 1990 to 15 August 19901991: 13 July 1991 to 31 August 19911992: 23 June 1992 to 14 August 19921994: 21 July 1994 to 14 August 19941996: 2 July 1996 to 25 August 19961997: 3 August 1997 to 3 August 19971998: 9 July 1998 to 6 September 19981999: 27 July 1999 to 27 August 19992000: 12 July 2000 to 9 August 20002001: 3 July 2001 to 17 August 20012002: 26 June 2002 to 18 July 20022003: 18 June 2003 to 15 August 20032004: 3 June 2004 to 15 August 20042005: 21 June 2005 to 21 August 20052006: 4 July 2006 to 21 August 20062007: 28 June 2007 to 16 August 20072008: 29 June 2008 to 18 August 20082009: 18 July 2009 to 25 July 20092010: 26 August 2010 to 26 August 20102011: 13 August 2011 to 28 August 20112012: 8 July 2012 to 8 August 20122013: 30 June 2013 to 1 September 20132014: 13 July 2014 to 11 August 20142015: 9 June 2015 to 26 August 20152016: 6 June 2016 to 5 August 20162017: 26 June 2017 to 3 September 20172018: 9 July 2018 to 6 September 20182019: 23 July 2019 to 5 September 20192020: 27 July 2020 to 4 September 20202021: 3 June 2021 to 13 August 20212022: 27 June 2022 to 6 September 20222023: 20 July 2023 to 29 August 20232024: 9 July 2024 to 3 August 20242025: 2 July 2025 to 3 September 20252026: 16 July 2026 to 22 August 202619861994200020052010201520202025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lolo Pass meeting 30 C (86 F).
First to last qualifying date each year at Lolo Pass
YearFirst dateLast date
19861986-05-261986-08-28
19871987-06-141987-09-23
19901990-06-221990-08-15
19911991-07-131991-08-31
19921992-06-231992-08-14
19941994-07-211994-08-14
19961996-07-021996-08-25
19971997-08-031997-08-03
19981998-07-091998-09-06
19991999-07-271999-08-27
20002000-07-122000-08-09
20012001-07-032001-08-17
20022002-06-262002-07-18
20032003-06-182003-08-15
20042004-06-032004-08-15
20052005-06-212005-08-21
20062006-07-042006-08-21
20072007-06-282007-08-16
20082008-06-292008-08-18
20092009-07-182009-07-25
20102010-08-262010-08-26
20112011-08-132011-08-28
20122012-07-082012-08-08
20132013-06-302013-09-01
20142014-07-132014-08-11
20152015-06-092015-08-26
20162016-06-062016-08-05
20172017-06-262017-09-03
20182018-07-092018-09-06
20192019-07-232019-09-05
20202020-07-272020-09-04
20212021-06-032021-08-13
20222022-06-272022-09-06
20232023-07-202023-08-29
20242024-07-092024-08-03
20252025-07-022025-09-03
20262026-07-162026-08-22

Every Fixed Threshold

Fixed thresholds at Lolo Pass
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days372320077
35 C (95 F): Days4620041
90 F (32.2 C): Days281020045
100 F (37.8 C): Days1120041
0 C (32 F): Ice days (max39121199725
0 C (32 F): Frost days (min332471999121
-10 C (14 F): Days with min3365202218
-20 C (-4 F): Days with min271419965
-30 C (-22 F): Days with min4320243
10 mm (0.39 in): Days with 10 mm or more rain4363199734
25 mm (0.98 in): Days with 25 mm or more rain431219952
50 mm (1.97 in): Days with 50 mm or more rain7220061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1986.

Download the Data

  • Data for Lolo 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 (2026-10-18).