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Built 2026-10-19 (19 October 2026)

Durham Threshold Days by Year (USC00172048)

16 fixed thresholds counted per year at Durham (USC00172048): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Durham Thresholds

  • Durham: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 2006 with 49.
  • Durham: days with 25 mm (0.98 in) or more of precipitation in 32 years, most in 2010 with 20.
  • Durham: days with 10 cm (3.9 in) or more of snowfall in 32 years, most in 1996 with 10.
  • Durham: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1995 with 30.
  • 16 fixed thresholds have at least one qualifying day at Durham.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Durham Days per year at Durham with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1995. 01020301995: 301996: 111997: 201998: 191999: 252000: 62001: 282002: 272003: 152004: 62006: 92007: 72008: 92009: 42010: 152011: 72012: 72013: 132014: 42015: 132016: 252017: 92018: 212019: 132020: 222021: 192022: 262023: 192024: 262025: 262026: 2719951999200320082012201620202024
Days per year at Durham with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 30 in 1995.
Days at or above 30 C (86 F) per year at Durham
YearDaysDecade average
19953021
19961121
19972021
19981921
19992521
2000612.3
20012812.3
20022712.3
20031512.3
2004612.3
2006912.3
2007712.3
2008912.3
2009412.3
20101512.7
2011712.7
2012712.7
20131312.7
2014412.7
20151312.7
20162512.7
2017912.7
20182112.7
20191312.7
20202223.6
20211923.6
20222623.6
20231923.6
20242623.6
20252623.6
20262723.6
First to last qualifying date each year at Durham For each year, a bar from the first to the last day at Durham meeting 30 C (86 F). 1995: 2 June 1995 to 2 September 19951996: 12 June 1996 to 7 September 19961997: 11 June 1997 to 18 August 19971998: 1 April 1998 to 7 September 19981999: 1 June 1999 to 5 September 19992000: 2 June 2000 to 2 September 20002001: 3 May 2001 to 10 September 20012002: 27 June 2002 to 11 September 20022003: 26 June 2003 to 23 August 20032004: 1 May 2004 to 29 August 20042006: 30 May 2006 to 3 August 20062007: 26 May 2007 to 4 August 20072008: 28 May 2008 to 18 July 20082009: 29 April 2009 to 19 August 20092010: 26 May 2010 to 3 September 20102011: 10 June 2011 to 24 July 20112012: 23 March 2012 to 16 July 20122013: 1 June 2013 to 12 September 20132014: 10 June 2014 to 24 July 20142015: 11 May 2015 to 19 September 20152016: 29 May 2016 to 10 September 20162017: 19 May 2017 to 26 September 20172018: 3 May 2018 to 7 September 20182019: 29 June 2019 to 13 August 20192020: 23 May 2020 to 26 August 20202021: 27 May 2021 to 28 August 20212022: 15 May 2022 to 5 September 20222023: 29 May 2023 to 10 September 20232024: 23 May 2024 to 18 September 20242025: 6 June 2025 to 7 October 20252026: 20 May 2026 to 11 September 202619951999200320082012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Durham meeting 30 C (86 F).
First to last qualifying date each year at Durham
YearFirst dateLast date
19951995-06-021995-09-02
19961996-06-121996-09-07
19971997-06-111997-08-18
19981998-04-011998-09-07
19991999-06-011999-09-05
20002000-06-022000-09-02
20012001-05-032001-09-10
20022002-06-272002-09-11
20032003-06-262003-08-23
20042004-05-012004-08-29
20062006-05-302006-08-03
20072007-05-262007-08-04
20082008-05-282008-07-18
20092009-04-292009-08-19
20102010-05-262010-09-03
20112011-06-102011-07-24
20122012-03-232012-07-16
20132013-06-012013-09-12
20142014-06-102014-07-24
20152015-05-112015-09-19
20162016-05-292016-09-10
20172017-05-192017-09-26
20182018-05-032018-09-07
20192019-06-292019-08-13
20202020-05-232020-08-26
20212021-05-272021-08-28
20222022-05-152022-09-05
20232023-05-292023-09-10
20242024-05-232024-09-18
20252025-06-062025-10-07
20262026-05-202026-09-11

Every Fixed Threshold

Fixed thresholds at Durham
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3130199527
35 C (95 F): Days11520022
90 F (32.2 C): Days291620029
0 C (32 F): Ice days (max3169200336
0 C (32 F): Frost days (min311941997108
-10 C (14 F): Days with min3177200751
-20 C (-4 F): Days with min2932200311
-30 C (-22 F): Days with min4220031
20 C (68 F): Tropical nights (min20920242
10 mm (0.39 in): Days with 10 mm or more rain3249200623
25 mm (0.98 in): Days with 25 mm or more rain322020105
50 mm (1.97 in): Days with 50 mm or more rain27519961
100 mm (3.94 in): Days with 100 mm or more rain10219961
10 cm (3.9 in): Days with 10 cm or more snowfall321019963
25 cm (9.8 in): Days with 25 cm or more snowfall18320091
50 cm (19.7 in): Days with 50 cm or more snowfall1120151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1995.

Download the Data

  • Data for Durham 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 (2026-10-17).