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Built 2026-10-19 (19 October 2026)

Montrose Rgnl AP Threshold Days by Year (USW00093013)

11 fixed thresholds counted per year at Montrose Rgnl AP (USW00093013): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Montrose Rgnl AP Thresholds

  • Montrose Rgnl AP: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 2018 with 90.
  • Montrose Rgnl AP: days with a maximum temperature at or above 35 C (95 F) in 29 years, most in 2007 with 25.
  • Montrose Rgnl AP: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 2007 with 62.
  • Montrose Rgnl AP: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 2013 with 34.
  • 11 fixed thresholds have at least one qualifying day at Montrose Rgnl AP.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Montrose Rgnl AP Days per year at Montrose Rgnl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 2018. 02550751001997: 511998: 631999: 402000: 842001: 772002: 792003: 672004: 632005: 632006: 732007: 842008: 772009: 622010: 782011: 732012: 822013: 792014: 752015: 662016: 632017: 762018: 902019: 742020: 892021: 812022: 712023: 702024: 772025: 761997200020032006200920122015201820212024
Days per year at Montrose Rgnl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 2018.
Days at or above 30 C (86 F) per year at Montrose Rgnl AP
YearDaysDecade average
19975151.3
19986351.3
19994051.3
20008472.9
20017772.9
20027972.9
20036772.9
20046372.9
20056372.9
20067372.9
20078472.9
20087772.9
20096272.9
20107875.6
20117375.6
20128275.6
20137975.6
20147575.6
20156675.6
20166375.6
20177675.6
20189075.6
20197475.6
20208977.3
20218177.3
20227177.3
20237077.3
20247777.3
20257677.3
First to last qualifying date each year at Montrose Rgnl AP For each year, a bar from the first to the last day at Montrose Rgnl AP meeting 30 C (86 F). 1997: 31 May 1997 to 2 September 19971998: 29 May 1998 to 18 September 19981999: 16 June 1999 to 29 August 19992000: 3 May 2000 to 16 September 20002001: 25 May 2001 to 28 September 20012002: 18 May 2002 to 5 September 20022003: 23 May 2003 to 2 September 20032004: 2 June 2004 to 17 September 20042005: 19 May 2005 to 7 September 20052006: 17 May 2006 to 31 August 20062007: 5 June 2007 to 14 September 20072008: 19 May 2008 to 25 September 20082009: 18 May 2009 to 28 September 20092010: 27 May 2010 to 30 September 20102011: 1 June 2011 to 5 September 20112012: 21 May 2012 to 10 September 20122013: 14 May 2013 to 7 September 20132014: 28 May 2014 to 26 September 20142015: 31 May 2015 to 1 October 20152016: 4 June 2016 to 19 September 20162017: 4 June 2017 to 13 September 20172018: 10 May 2018 to 18 September 20182019: 13 June 2019 to 7 September 20192020: 1 May 2020 to 25 September 20202021: 3 June 2021 to 16 September 20212022: 27 May 2022 to 12 September 20222023: 19 June 2023 to 9 September 20232024: 29 May 2024 to 30 September 20242025: 30 May 2025 to 10 September 202519972001200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Montrose Rgnl AP meeting 30 C (86 F).
First to last qualifying date each year at Montrose Rgnl AP
YearFirst dateLast date
19971997-05-311997-09-02
19981998-05-291998-09-18
19991999-06-161999-08-29
20002000-05-032000-09-16
20012001-05-252001-09-28
20022002-05-182002-09-05
20032003-05-232003-09-02
20042004-06-022004-09-17
20052005-05-192005-09-07
20062006-05-172006-08-31
20072007-06-052007-09-14
20082008-05-192008-09-25
20092009-05-182009-09-28
20102010-05-272010-09-30
20112011-06-012011-09-05
20122012-05-212012-09-10
20132013-05-142013-09-07
20142014-05-282014-09-26
20152015-05-312015-10-01
20162016-06-042016-09-19
20172017-06-042017-09-13
20182018-05-102018-09-18
20192019-06-132019-09-07
20202020-05-012020-09-25
20212021-06-032021-09-16
20222022-05-272022-09-12
20232023-06-192023-09-09
20242024-05-292024-09-30
20252025-05-302025-09-10

Every Fixed Threshold

Fixed thresholds at Montrose Rgnl AP
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2990201876
35 C (95 F): Days2925200716
90 F (32.2 C): Days2962200751
100 F (37.8 C): Days8420032
0 C (32 F): Ice days (max2934201310
0 C (32 F): Frost days (min291771999138
-10 C (14 F): Days with min2953200721
-20 C (-4 F): Days with min161020132
20 C (68 F): Tropical nights (min14220122
10 mm (0.39 in): Days with 10 mm or more rain26820061
25 mm (0.98 in): Days with 25 mm or more rain2120211

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Montrose Rgnl AP 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 (2025-12-31).