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Built 2026-10-19 (19 October 2026)

Nights at or below -20 C (-4 F) in Denver

Denver has had nights with a minimum temperature at or below -20 C (-4 F) in 28 years, most in 2014 with 11. Days per year, season span, streaks and every date.

Key Facts for Denver

  • Denver has had nights with a minimum temperature at or below -20 C (-4 F) in 28 years, 108 days in all.
  • The most in one year was 11 days in 2014.
  • In 2026, the latest year on file, there were 2 such days.
  • The earliest first date in a year was 1 January 2019.
  • The latest last date in a year was 31 December 2014.
  • The longest run inside a single year was 5 days in 1998.
  • 4 years with under 90 percent of days observed are left out of these rankings.

Days per Year

28 years, 108 days
Nights at or below -20 C (-4 F) per year in Denver Days per year in Denver with a minimum temperature at or below -20 C (-4 F). The line is the decade average. The most was 11 in 2014. Grey bars are years with under 90 percent of days observed, left out of rankings. 0510151996: 81997: 51998: 52001: 12002: 22003: 22004: 42005: 22006: 32007: 32008: 52009: 22010: 32011: 82012: 22014: 112015: 42016: 42017: 12018: 12019: 52020: 22021: 32022: 72023: 52024: 42025: 42026: 2199620082019
Days per year in Denver with a minimum temperature at or below -20 C (-4 F). The line is the decade average. The most was 11 in 2014. Grey bars are years with under 90 percent of days observed, left out of rankings.
Nights at or below -20 C (-4 F) per year in Denver
YearDaysDecade average
199686
199756
199856
200112.7
200222.7
200322.7
200442.7
200522.7
200632.7
200732.7
200852.7
200922.7
201034.3
201184.3
201224.3
2014114.3
201544.3
201644.3
201714.3
201814.3
201954.3
202023.9
202133.9
202273.9
202353.9
202443.9
202543.9
202623.9

Season Span

earliest 1 January, latest 31 December
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 (-4 F). Long bars mean a long season. 1996: 6 January 1996 to 19 December 19961997: 11 January 1997 to 17 January 19971998: 20 December 1998 to 24 December 19982001: 9 February 2001 to 9 February 20012002: 26 February 2002 to 2 March 20022003: 7 February 2003 to 24 February 20032004: 5 January 2004 to 23 December 20042005: 7 December 2005 to 8 December 20052006: 17 February 2006 to 19 February 20062007: 13 January 2007 to 2 February 20072008: 4 December 2008 to 16 December 20082009: 27 January 2009 to 9 December 20092010: 6 January 2010 to 8 January 20102011: 12 January 2011 to 6 December 20112012: 11 January 2012 to 12 January 20122014: 5 January 2014 to 31 December 20142015: 3 January 2015 to 27 February 20152016: 7 December 2016 to 18 December 20162017: 6 January 2017 to 6 January 20172018: 21 February 2018 to 21 February 20182019: 1 January 2019 to 4 March 20192020: 4 February 2020 to 5 February 20202021: 13 February 2021 to 15 February 20212022: 1 January 2022 to 23 December 20222023: 29 January 2023 to 23 February 20232024: 13 January 2024 to 16 January 20242025: 18 January 2025 to 19 February 20252026: 25 January 2026 to 26 January 20261996200220062010201520192023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Denver meeting -20 C (-4 F). Long bars mean a long season.
First to last qualifying date each year in Denver
YearFirst dateLast date
19961996-01-061996-12-19
19971997-01-111997-01-17
19981998-12-201998-12-24
20012001-02-092001-02-09
20022002-02-262002-03-02
20032003-02-072003-02-24
20042004-01-052004-12-23
20052005-12-072005-12-08
20062006-02-172006-02-19
20072007-01-132007-02-02
20082008-12-042008-12-16
20092009-01-272009-12-09
20102010-01-062010-01-08
20112011-01-122011-12-06
20122012-01-112012-01-12
20142014-01-052014-12-31
20152015-01-032015-02-27
20162016-12-072016-12-18
20172017-01-062017-01-06
20182018-02-212018-02-21
20192019-01-012019-03-04
20202020-02-042020-02-05
20212021-02-132021-02-15
20222022-01-012022-12-23
20232023-01-292023-02-23
20242024-01-132024-01-16
20252025-01-182025-02-19
20262026-01-252026-01-26

Every Year

Nights at or below -20 C (-4 F) per year in Denver
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026225 January 202626 January 20262 daysIncomplete, not ranked
2025418 January 202519 February 20253 daysComplete
2024413 January 202416 January 20244 daysComplete
2023529 January 202323 February 20233 daysComplete
202271 January 202223 December 20223 daysComplete
2021313 February 202115 February 20213 daysComplete
202024 February 20205 February 20202 daysComplete
201951 January 20194 March 20192 daysComplete
2018121 February 201821 February 20181 daysComplete
201716 January 20176 January 20171 daysComplete
201647 December 201618 December 20162 daysComplete
201543 January 201527 February 20153 daysComplete
2014115 January 201431 December 20144 daysComplete
2012211 January 201212 January 20122 daysComplete
2011812 January 20116 December 20113 daysComplete
201036 January 20108 January 20103 daysComplete
2009227 January 20099 December 20091 daysComplete
200854 December 200816 December 20083 daysComplete
2007313 January 20072 February 20072 daysComplete
2006317 February 200619 February 20063 daysComplete
200527 December 20058 December 20052 daysComplete
200445 January 200423 December 20042 daysComplete
200327 February 200324 February 20031 daysComplete
2002226 February 20022 March 20021 daysComplete
200119 February 20019 February 20011 daysComplete
1998520 December 199824 December 19985 daysComplete
1997511 January 199717 January 19974 daysComplete
199686 January 199619 December 19963 daysComplete
Decade averages for Nights at or below -20 C (-4 F) in Denver
DecadeAverage days per yearYears counted
1990s6.03
2000s2.79
2010s4.39
2020s4.26

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 below -20 C (-4 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).