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Built 2026-10-19 (19 October 2026)

Randolph Threshold Days by Year (USC00427165)

15 fixed thresholds counted per year at Randolph (USC00427165): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Randolph Thresholds

  • Randolph: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 2014 with 16.
  • Randolph: days with 10 cm (3.9 in) or more of snowfall in 34 years, most in 2017 with 16.
  • Randolph: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2025 with 58.
  • Randolph: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 2001 with 89.
  • 15 fixed thresholds have at least one qualifying day at Randolph.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Randolph Days per year at Randolph with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 2025. 0204060801997: 101998: 161999: 122000: 92001: 162002: 222003: 392004: 92005: 142006: 172007: 312008: 142009: 42010: 72011: 32012: 162013: 282014: 132015: 132016: 132017: 122018: 242019: 132020: 292021: 532022: 402023: 162024: 202025: 582026: 751997200020032006200920122015201820212024
Days per year at Randolph with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 2025.
Days at or above 30 C (86 F) per year at Randolph
YearDaysDecade average
19971012.7
19981612.7
19991212.7
2000917.5
20011617.5
20022217.5
20033917.5
2004917.5
20051417.5
20061717.5
20073117.5
20081417.5
2009417.5
2010714.2
2011314.2
20121614.2
20132814.2
20141314.2
20151314.2
20161314.2
20171214.2
20182414.2
20191314.2
20202941.6
20215341.6
20224041.6
20231641.6
20242041.6
20255841.6
20267541.6
First to last qualifying date each year at Randolph For each year, a bar from the first to the last day at Randolph meeting 30 C (86 F). 1997: 5 July 1997 to 22 August 19971998: 1 July 1998 to 14 August 19981999: 4 July 1999 to 4 August 19992000: 13 July 2000 to 31 July 20002001: 23 June 2001 to 28 August 20012002: 25 June 2002 to 31 July 20022003: 29 May 2003 to 27 August 20032004: 13 July 2004 to 16 August 20042005: 22 June 2005 to 8 August 20052006: 7 June 2006 to 31 July 20062007: 23 June 2007 to 17 August 20072008: 2 July 2008 to 26 August 20082009: 3 August 2009 to 23 August 20092010: 30 June 2010 to 27 August 20102011: 4 July 2011 to 27 August 20112012: 25 June 2012 to 29 August 20122013: 28 June 2013 to 6 September 20132014: 4 July 2014 to 28 July 20142015: 25 June 2015 to 26 August 20152016: 21 June 2016 to 2 August 20162017: 20 June 2017 to 5 September 20172018: 28 June 2018 to 15 August 20182019: 12 July 2019 to 3 September 20192020: 12 July 2020 to 8 September 20202021: 4 June 2021 to 12 September 20212022: 18 June 2022 to 11 September 20222023: 17 July 2023 to 21 August 20232024: 14 June 2024 to 26 July 20242025: 2 June 2025 to 6 September 20252026: 13 May 2026 to 10 October 202619972001200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Randolph meeting 30 C (86 F).
First to last qualifying date each year at Randolph
YearFirst dateLast date
19971997-07-051997-08-22
19981998-07-011998-08-14
19991999-07-041999-08-04
20002000-07-132000-07-31
20012001-06-232001-08-28
20022002-06-252002-07-31
20032003-05-292003-08-27
20042004-07-132004-08-16
20052005-06-222005-08-08
20062006-06-072006-07-31
20072007-06-232007-08-17
20082008-07-022008-08-26
20092009-08-032009-08-23
20102010-06-302010-08-27
20112011-07-042011-08-27
20122012-06-252012-08-29
20132013-06-282013-09-06
20142014-07-042014-07-28
20152015-06-252015-08-26
20162016-06-212016-08-02
20172017-06-202017-09-05
20182018-06-282018-08-15
20192019-07-122019-09-03
20202020-07-122020-09-08
20212021-06-042021-09-12
20222022-06-182022-09-11
20232023-07-172023-08-21
20242024-06-142024-07-26
20252025-06-022025-09-06
20262026-05-132026-10-10

Every Fixed Threshold

Fixed thresholds at Randolph
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3058202575
35 C (95 F): Days53200234
90 F (32.2 C): Days2730202156
100 F (37.8 C): Days10n/a12
0 C (32 F): Ice days (max308920017
0 C (32 F): Frost days (min252592022115
-10 C (14 F): Days with min25130202336
-20 C (-4 F): Days with min255020224
-30 C (-22 F): Days with min19519981
-40 C (-40 F): Days with min30n/a2
20 C (68 F): Tropical nights (min10n/a5
10 mm (0.39 in): Days with 10 mm or more rain451620148
25 mm (0.98 in): Days with 25 mm or more rain18320131
10 cm (3.9 in): Days with 10 cm or more snowfall341620171
25 cm (9.8 in): Days with 25 cm or more snowfall4220232

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Randolph 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).