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Built 2026-10-19 (19 October 2026)

Denver Water Dept Threshold Days by Year (USC00052223)

15 fixed thresholds counted per year at Denver Water Dept (USC00052223): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Denver Water Dept Thresholds

  • Denver Water Dept: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 2020 with 106.
  • Denver Water Dept: days with a maximum temperature at or above 35 C (95 F) in 27 years, most in 2012 with 54.
  • Denver Water Dept: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 2000 with 85.
  • Denver Water Dept: days with a maximum temperature at or above 100 F (37.8 C) in 27 years, most in 2012 with 21.
  • 15 fixed thresholds have at least one qualifying day at Denver Water Dept.
27 years with a qualifying day
Days at or above 30 C (86 F) per year at Denver Water Dept Days per year at Denver Water Dept with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 2020. 0501001501998: 901999: 802000: 1042001: 1012002: 962003: 862004: 652005: 942006: 612007: 782008: 752009: 662010: 932011: 912012: 1012013: 922014: 722015: 862016: 922017: 772018: 942020: 1062021: 972022: 1022023: 752024: 992025: 80199820012004200720102013201620202023
Days per year at Denver Water Dept with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 2020.
Days at or above 30 C (86 F) per year at Denver Water Dept
YearDaysDecade average
19989085
19998085
200010482.6
200110182.6
20029682.6
20038682.6
20046582.6
20059482.6
20066182.6
20077882.6
20087582.6
20096682.6
20109388.7
20119188.7
201210188.7
20139288.7
20147288.7
20158688.7
20169288.7
20177788.7
20189488.7
202010693.2
20219793.2
202210293.2
20237593.2
20249993.2
20258093.2
First to last qualifying date each year at Denver Water Dept For each year, a bar from the first to the last day at Denver Water Dept meeting 30 C (86 F). 1998: 14 May 1998 to 30 September 19981999: 14 May 1999 to 15 October 19992000: 5 May 2000 to 2 October 20002001: 2 May 2001 to 4 October 20012002: 15 April 2002 to 25 September 20022003: 23 May 2003 to 24 October 20032004: 6 May 2004 to 20 September 20042005: 17 May 2005 to 4 October 20052006: 21 May 2006 to 15 September 20062007: 12 May 2007 to 6 October 20072008: 19 May 2008 to 29 September 20082009: 8 May 2009 to 30 September 20092010: 23 May 2010 to 8 October 20102011: 8 May 2011 to 16 October 20112012: 1 April 2012 to 4 October 20122013: 14 May 2013 to 1 October 20132014: 6 May 2014 to 26 September 20142015: 1 June 2015 to 15 October 20152016: 6 May 2016 to 28 October 20162017: 7 May 2017 to 26 October 20172018: 11 May 2018 to 4 October 20182020: 2 May 2020 to 10 October 20202021: 2 May 2021 to 6 October 20212022: 23 April 2022 to 21 September 20222023: 12 April 2023 to 21 October 20232024: 2 June 2024 to 5 October 20242025: 13 April 2025 to 10 October 20251998200220062010201420182023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Denver Water Dept meeting 30 C (86 F).
First to last qualifying date each year at Denver Water Dept
YearFirst dateLast date
19981998-05-141998-09-30
19991999-05-141999-10-15
20002000-05-052000-10-02
20012001-05-022001-10-04
20022002-04-152002-09-25
20032003-05-232003-10-24
20042004-05-062004-09-20
20052005-05-172005-10-04
20062006-05-212006-09-15
20072007-05-122007-10-06
20082008-05-192008-09-29
20092009-05-082009-09-30
20102010-05-232010-10-08
20112011-05-082011-10-16
20122012-04-012012-10-04
20132013-05-142013-10-01
20142014-05-062014-09-26
20152015-06-012015-10-15
20162016-05-062016-10-28
20172017-05-072017-10-26
20182018-05-112018-10-04
20202020-05-022020-10-10
20212021-05-022021-10-06
20222022-04-232022-09-21
20232023-04-122023-10-21
20242024-06-022024-10-05
20252025-04-132025-10-10

Every Fixed Threshold

Fixed thresholds at Denver Water Dept
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days27106202080
35 C (95 F): Days2754201238
40 C (104 F): Days13520031
90 F (32.2 C): Days2785200061
100 F (37.8 C): Days2721201210
0 C (32 F): Ice days (max2734200716
0 C (32 F): Frost days (min261782013115
-10 C (14 F): Days with min2647201328
-20 C (-4 F): Days with min17720142
20 C (68 F): Tropical nights (min211020225
10 mm (0.39 in): Days with 10 mm or more rain262420159
25 mm (0.98 in): Days with 25 mm or more rain24520222
50 mm (1.97 in): Days with 50 mm or more rain2120041
10 cm (3.9 in): Days with 10 cm or more snowfall26520071
25 cm (9.8 in): Days with 25 cm or more snowfall2120031

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1998.

Download the Data

  • Data for Denver Water Dept 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).