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Built 2026-10-19 (19 October 2026)

Combination Threshold Days by Year (USS0013C33S)

13 fixed thresholds counted per year at Combination (USS0013C33S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Combination Thresholds

  • Combination: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1995 with 30.
  • Combination: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 2003 with 27.
  • Combination: days with a maximum temperature at or below 0 C (32 F) in 37 years, most in 1997 with 72.
  • Combination: nights with a minimum temperature at or below 0 C (32 F) in 33 years, most in 2004 with 237.
  • 13 fixed thresholds have at least one qualifying day at Combination.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Combination Days per year at Combination with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 27 in 2003. 01020301990: 161991: 111992: 81993: 31994: 71995: 51996: 111997: 21998: 181999: 102000: 162001: 112002: 102003: 272004: 52005: 162006: 202007: 222008: 102009: 52010: 42011: 82012: 172013: 162014: 62015: 172016: 62017: 162018: 82019: 32020: 82021: 192022: 262023: 92024: 192025: 82026: 141990199419982002200620102014201820222026
Days per year at Combination with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 27 in 2003.
Days at or above 30 C (86 F) per year at Combination
YearDaysDecade average
1990169.1
1991119.1
199289.1
199339.1
199479.1
199559.1
1996119.1
199729.1
1998189.1
1999109.1
20001614.2
20011114.2
20021014.2
20032714.2
2004514.2
20051614.2
20062014.2
20072214.2
20081014.2
2009514.2
2010410.1
2011810.1
20121710.1
20131610.1
2014610.1
20151710.1
2016610.1
20171610.1
2018810.1
2019310.1
2020814.7
20211914.7
20222614.7
2023914.7
20241914.7
2025814.7
20261414.7
First to last qualifying date each year at Combination For each year, a bar from the first to the last day at Combination meeting 30 C (86 F). 1990: 25 June 1990 to 29 August 19901991: 3 July 1991 to 30 August 19911992: 23 June 1992 to 19 August 19921993: 20 June 1993 to 29 July 19931994: 21 July 1994 to 15 August 19941995: 8 July 1995 to 2 September 19951996: 7 June 1996 to 26 August 19961997: 7 August 1997 to 23 August 19971998: 16 July 1998 to 7 September 19981999: 12 July 1999 to 30 August 19992000: 12 July 2000 to 15 September 20002001: 3 July 2001 to 24 September 20012002: 26 June 2002 to 24 July 20022003: 28 May 2003 to 4 September 20032004: 14 July 2004 to 1 August 20042005: 21 June 2005 to 29 August 20052006: 28 June 2006 to 29 August 20062007: 28 June 2007 to 3 September 20072008: 29 June 2008 to 24 August 20082009: 18 July 2009 to 21 August 20092010: 16 July 2010 to 26 August 20102011: 18 July 2011 to 27 August 20112012: 24 June 2012 to 28 August 20122013: 30 June 2013 to 1 September 20132014: 13 July 2014 to 11 August 20142015: 8 June 2015 to 26 August 20152016: 8 June 2016 to 16 August 20162017: 26 June 2017 to 3 September 20172018: 6 July 2018 to 11 August 20182019: 4 August 2019 to 7 August 20192020: 22 July 2020 to 5 September 20202021: 14 June 2021 to 8 September 20212022: 17 June 2022 to 7 September 20222023: 21 July 2023 to 17 August 20232024: 9 July 2024 to 18 August 20242025: 31 May 2025 to 3 September 20252026: 11 July 2026 to 21 August 202619901995200020052010201520202025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Combination meeting 30 C (86 F).
First to last qualifying date each year at Combination
YearFirst dateLast date
19901990-06-251990-08-29
19911991-07-031991-08-30
19921992-06-231992-08-19
19931993-06-201993-07-29
19941994-07-211994-08-15
19951995-07-081995-09-02
19961996-06-071996-08-26
19971997-08-071997-08-23
19981998-07-161998-09-07
19991999-07-121999-08-30
20002000-07-122000-09-15
20012001-07-032001-09-24
20022002-06-262002-07-24
20032003-05-282003-09-04
20042004-07-142004-08-01
20052005-06-212005-08-29
20062006-06-282006-08-29
20072007-06-282007-09-03
20082008-06-292008-08-24
20092009-07-182009-08-21
20102010-07-162010-08-26
20112011-07-182011-08-27
20122012-06-242012-08-28
20132013-06-302013-09-01
20142014-07-132014-08-11
20152015-06-082015-08-26
20162016-06-082016-08-16
20172017-06-262017-09-03
20182018-07-062018-08-11
20192019-08-042019-08-07
20202020-07-222020-09-05
20212021-06-142021-09-08
20222022-06-172022-09-07
20232023-07-212023-08-17
20242024-07-092024-08-18
20252025-05-312025-09-03
20262026-07-112026-08-21

Every Fixed Threshold

Fixed thresholds at Combination
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3727200314
35 C (95 F): Days5319921
40 C (104 F): Days1119921
90 F (32.2 C): Days301220032
100 F (37.8 C): Days1119921
0 C (32 F): Ice days (max3772199715
0 C (32 F): Frost days (min332372004133
-10 C (14 F): Days with min3377201917
-20 C (-4 F): Days with min302519966
-30 C (-22 F): Days with min17420221
10 mm (0.39 in): Days with 10 mm or more rain483019959
25 mm (0.98 in): Days with 25 mm or more rain32419801
50 mm (1.97 in): Days with 50 mm or more rain1119951

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Combination 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).