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Built 2026-10-19 (19 October 2026)

Nights at or above 20 C (68 F) in Denver

Denver has had nights with a minimum temperature at or above 20 C (68 F) in 28 years, most in 2012 with 8. Days per year, season span, streaks and every date.

Key Facts for Denver

  • Denver has had nights with a minimum temperature at or above 20 C (68 F) in 28 years, 88 days in all.
  • The most in one year was 8 days in 2012.
  • In 2026, the latest year on file, there were 8 such days.
  • The earliest first date in a year was 7 June 2004.
  • The latest last date in a year was 1 September 2011.
  • The longest run inside a single year was 3 days in 1998.
  • 4 years with under 90 percent of days observed are left out of these rankings.

Days per Year

28 years, 88 days
Nights at or above 20 C (68 F) per year in Denver Days per year in Denver with a minimum temperature at or above 20 C (68 F). The line is the decade average. The most was 8 in 2012. Grey bars are years with under 90 percent of days observed, left out of rankings. 024681996: 11997: 21998: 41999: 22000: 42001: 62002: 22003: 32004: 12005: 42006: 52007: 12008: 42010: 12011: 12012: 82014: 32016: 12017: 12018: 12019: 22020: 22021: 52022: 82023: 42024: 22025: 22026: 8199620062019
Days per year in Denver with a minimum temperature at or above 20 C (68 F). The line is the decade average. The most was 8 in 2012. Grey bars are years with under 90 percent of days observed, left out of rankings.
Nights at or above 20 C (68 F) per year in Denver
YearDaysDecade average
199612.3
199722.3
199842.3
199922.3
200043.3
200163.3
200223.3
200333.3
200413.3
200543.3
200653.3
200713.3
200843.3
201012.3
201112.3
201282.3
201432.3
201612.3
201712.3
201812.3
201922.3
202024.4
202154.4
202284.4
202344.4
202424.4
202524.4
202684.4

Season Span

earliest 7 June, latest 1 September
First to last qualifying date each year in Denver For each year, a bar from the first to the last day in Denver meeting 20 C (68 F). Long bars mean a long season. 1996: 3 July 1996 to 3 July 19961997: 16 July 1997 to 17 July 19971998: 14 July 1998 to 20 July 19981999: 3 July 1999 to 4 July 19992000: 15 July 2000 to 8 August 20002001: 2 July 2001 to 5 August 20012002: 2 July 2002 to 30 July 20022003: 17 July 2003 to 25 July 20032004: 7 June 2004 to 7 June 20042005: 8 July 2005 to 30 July 20052006: 16 July 2006 to 10 August 20062007: 18 July 2007 to 18 July 20072008: 5 July 2008 to 2 August 20082010: 13 July 2010 to 13 July 20102011: 1 September 2011 to 1 September 20112012: 24 June 2012 to 6 August 20122014: 20 July 2014 to 25 July 20142016: 22 July 2016 to 22 July 20162017: 25 July 2017 to 25 July 20172018: 21 July 2018 to 21 July 20182019: 17 July 2019 to 4 August 20192020: 24 August 2020 to 25 August 20202021: 17 June 2021 to 9 August 20212022: 10 July 2022 to 12 August 20222023: 18 July 2023 to 22 August 20232024: 25 June 2024 to 14 July 20242025: 14 July 2025 to 7 August 20252026: 16 July 2026 to 11 August 20261996200020042008201420192023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Denver meeting 20 C (68 F). Long bars mean a long season.
First to last qualifying date each year in Denver
YearFirst dateLast date
19961996-07-031996-07-03
19971997-07-161997-07-17
19981998-07-141998-07-20
19991999-07-031999-07-04
20002000-07-152000-08-08
20012001-07-022001-08-05
20022002-07-022002-07-30
20032003-07-172003-07-25
20042004-06-072004-06-07
20052005-07-082005-07-30
20062006-07-162006-08-10
20072007-07-182007-07-18
20082008-07-052008-08-02
20102010-07-132010-07-13
20112011-09-012011-09-01
20122012-06-242012-08-06
20142014-07-202014-07-25
20162016-07-222016-07-22
20172017-07-252017-07-25
20182018-07-212018-07-21
20192019-07-172019-08-04
20202020-08-242020-08-25
20212021-06-172021-08-09
20222022-07-102022-08-12
20232023-07-182023-08-22
20242024-06-252024-07-14
20252025-07-142025-08-07
20262026-07-162026-08-11

Every Year

Nights at or above 20 C (68 F) per year in Denver
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026816 July 202611 August 20263 daysIncomplete, not ranked
2025214 July 20257 August 20251 daysComplete
2024225 June 202414 July 20241 daysComplete
2023418 July 202322 August 20232 daysComplete
2022810 July 202212 August 20222 daysComplete
2021517 June 20219 August 20211 daysComplete
2020224 August 202025 August 20202 daysComplete
2019217 July 20194 August 20191 daysComplete
2018121 July 201821 July 20181 daysComplete
2017125 July 201725 July 20171 daysComplete
2016122 July 201622 July 20161 daysComplete
2014320 July 201425 July 20142 daysComplete
2012824 June 20126 August 20122 daysComplete
201111 September 20111 September 20111 daysComplete
2010113 July 201013 July 20101 daysComplete
200845 July 20082 August 20081 daysComplete
2007118 July 200718 July 20071 daysComplete
2006516 July 200610 August 20062 daysComplete
200548 July 200530 July 20051 daysComplete
200417 June 20047 June 20041 daysComplete
2003317 July 200325 July 20032 daysComplete
200222 July 200230 July 20021 daysComplete
200162 July 20015 August 20012 daysComplete
2000415 July 20008 August 20001 daysComplete
199923 July 19994 July 19992 daysComplete
1998414 July 199820 July 19983 daysComplete
1997216 July 199717 July 19972 daysComplete
199613 July 19963 July 19961 daysComplete
Decade averages for Nights at or above 20 C (68 F) in Denver
DecadeAverage days per yearYears counted
1990s2.34
2000s3.39
2010s2.38
2020s3.86

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Nights at or above 20 C (68 F) in Denver, 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 from the threaded city record.

Data as of . Last revised (2026-10-17).