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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

South Fork Bull Run Threshold Days by Year (USS0022D03S)

12 fixed thresholds counted per year at South Fork Bull Run (USS0022D03S): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for South Fork Bull Run Thresholds

  • South Fork Bull Run: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 2012 with 122.
  • South Fork Bull Run: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 2006 with 58.
  • South Fork Bull Run: days with 50 mm (1.97 in) or more of precipitation in 28 years, most in 2012 with 17.
  • South Fork Bull Run: days with a maximum temperature at or below 0 C (32 F) in 27 years, most in 2019 with 17.
  • 12 fixed thresholds have at least one qualifying day at South Fork Bull Run.
26 years with a qualifying day
Days at or above 30 C (86 F) per year at South Fork Bull Run Days per year at South Fork Bull Run with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 17 in 2017. 051015201998: 72000: 22001: 32002: 82003: 122004: 62005: 92006: 142007: 42009: 102010: 82011: 42012: 62013: 32014: 42015: 132016: 92017: 172018: 102019: 32020: 82021: 122022: 142023: 102024: 142025: 9199820022005200920122015201820212024
Days per year at South Fork Bull Run with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 17 in 2017.
Days at or above 30 C (86 F) per year at South Fork Bull Run
YearDaysDecade average
199877
200027.6
200137.6
200287.6
2003127.6
200467.6
200597.6
2006147.6
200747.6
2009107.6
201087.7
201147.7
201267.7
201337.7
201447.7
2015137.7
201697.7
2017177.7
2018107.7
201937.7
2020811.2
20211211.2
20221411.2
20231011.2
20241411.2
2025911.2
First to last qualifying date each year at South Fork Bull Run For each year, a bar from the first to the last day at South Fork Bull Run meeting 30 C (86 F). 1998: 16 July 1998 to 1 September 19982000: 27 June 2000 to 13 September 20002001: 22 May 2001 to 9 August 20012002: 13 June 2002 to 13 September 20022003: 5 June 2003 to 26 September 20032004: 12 July 2004 to 11 August 20042005: 27 May 2005 to 25 August 20052006: 15 May 2006 to 2 September 20062007: 10 July 2007 to 29 August 20072009: 2 July 2009 to 22 September 20092010: 8 July 2010 to 25 August 20102011: 20 August 2011 to 11 September 20112012: 4 August 2012 to 17 September 20122013: 30 June 2013 to 11 September 20132014: 1 July 2014 to 11 August 20142015: 26 June 2015 to 11 September 20152016: 4 June 2016 to 26 September 20162017: 24 June 2017 to 11 September 20172018: 20 June 2018 to 14 August 20182019: 12 June 2019 to 5 September 20192020: 23 June 2020 to 29 September 20202021: 1 June 2021 to 7 September 20212022: 26 June 2022 to 6 September 20222023: 6 June 2023 to 26 August 20232024: 6 July 2024 to 25 September 20242025: 9 June 2025 to 3 September 20251998200320072012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at South Fork Bull Run meeting 30 C (86 F).
First to last qualifying date each year at South Fork Bull Run
YearFirst dateLast date
19981998-07-161998-09-01
20002000-06-272000-09-13
20012001-05-222001-08-09
20022002-06-132002-09-13
20032003-06-052003-09-26
20042004-07-122004-08-11
20052005-05-272005-08-25
20062006-05-152006-09-02
20072007-07-102007-08-29
20092009-07-022009-09-22
20102010-07-082010-08-25
20112011-08-202011-09-11
20122012-08-042012-09-17
20132013-06-302013-09-11
20142014-07-012014-08-11
20152015-06-262015-09-11
20162016-06-042016-09-26
20172017-06-242017-09-11
20182018-06-202018-08-14
20192019-06-122019-09-05
20202020-06-232020-09-29
20212021-06-012021-09-07
20222022-06-262022-09-06
20232023-06-062023-08-26
20242024-07-062024-09-25
20252025-06-092025-09-03

Every Fixed Threshold

Fixed thresholds at South Fork Bull Run
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days261720179
35 C (95 F): Days10320061
90 F (32.2 C): Days241020172
100 F (37.8 C): Days2120061
0 C (32 F): Ice days (max2717201910
0 C (32 F): Frost days (min26143201166
-10 C (14 F): Days with min15620132
20 C (68 F): Tropical nights (min3220061
10 mm (0.39 in): Days with 10 mm or more rain28122201293
25 mm (0.98 in): Days with 25 mm or more rain2858200633
50 mm (1.97 in): Days with 50 mm or more rain2817201210
100 mm (3.94 in): Days with 100 mm or more rain17219992

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1998.

Download the Data

  • Data for South Fork Bull Run 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 (2025-12-31).