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Data as of 2026-10-16
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Built 2026-10-19 (19 October 2026)

Charleston WFO Threshold Days by Year (USC00461579)

14 fixed thresholds counted per year at Charleston WFO (USC00461579): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Charleston WFO Thresholds

  • Charleston WFO: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2007 with 91.
  • Charleston WFO: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 2007 with 50.
  • Charleston WFO: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 2010 with 44.
  • Charleston WFO: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 2010 with 132.
  • 14 fixed thresholds have at least one qualifying day at Charleston WFO.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Charleston WFO Days per year at Charleston WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 91 in 2007. 02550751001997: 281998: 591999: 732000: 312001: 622002: 732003: 332004: 342005: 672006: 542007: 912008: 532009: 332010: 882011: 692012: 792013: 492014: 412015: 682016: 762017: 532018: 742019: 872020: 642021: 592022: 492023: 392024: 752025: 692026: 531997200020032006200920122015201820212024
Days per year at Charleston WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 91 in 2007.
Days at or above 30 C (86 F) per year at Charleston WFO
YearDaysDecade average
19972853.3
19985953.3
19997353.3
20003153.1
20016253.1
20027353.1
20033353.1
20043453.1
20056753.1
20065453.1
20079153.1
20085353.1
20093353.1
20108868.4
20116968.4
20127968.4
20134968.4
20144168.4
20156868.4
20167668.4
20175368.4
20187468.4
20198768.4
20206458.3
20215958.3
20224958.3
20233958.3
20247558.3
20256958.3
20265358.3
First to last qualifying date each year at Charleston WFO For each year, a bar from the first to the last day at Charleston WFO meeting 30 C (86 F). 1997: 21 June 1997 to 3 September 19971998: 28 March 1998 to 6 October 19981999: 23 April 1999 to 27 September 19992000: 7 May 2000 to 11 September 20002001: 8 April 2001 to 14 September 20012002: 17 April 2002 to 5 October 20022003: 25 June 2003 to 15 September 20032004: 19 April 2004 to 25 September 20042005: 14 May 2005 to 5 October 20052006: 26 May 2006 to 19 September 20062007: 4 April 2007 to 9 October 20072008: 11 April 2008 to 13 October 20082009: 25 April 2009 to 28 August 20092010: 2 April 2010 to 27 October 20102011: 11 April 2011 to 15 September 20112012: 21 March 2012 to 3 October 20122013: 10 April 2013 to 7 October 20132014: 14 April 2014 to 7 September 20142015: 10 April 2015 to 20 September 20152016: 19 April 2016 to 20 October 20162017: 27 April 2017 to 8 October 20172018: 14 April 2018 to 9 October 20182019: 12 April 2019 to 4 October 20192020: 29 March 2020 to 11 September 20202021: 28 April 2021 to 20 September 20212022: 24 April 2022 to 22 September 20222023: 6 April 2023 to 8 September 20232024: 16 April 2024 to 7 October 20242025: 20 March 2025 to 22 September 20252026: 8 March 2026 to 31 August 202619972001200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Charleston WFO meeting 30 C (86 F).
First to last qualifying date each year at Charleston WFO
YearFirst dateLast date
19971997-06-211997-09-03
19981998-03-281998-10-06
19991999-04-231999-09-27
20002000-05-072000-09-11
20012001-04-082001-09-14
20022002-04-172002-10-05
20032003-06-252003-09-15
20042004-04-192004-09-25
20052005-05-142005-10-05
20062006-05-262006-09-19
20072007-04-042007-10-09
20082008-04-112008-10-13
20092009-04-252009-08-28
20102010-04-022010-10-27
20112011-04-112011-09-15
20122012-03-212012-10-03
20132013-04-102013-10-07
20142014-04-142014-09-07
20152015-04-102015-09-20
20162016-04-192016-10-20
20172017-04-272017-10-08
20182018-04-142018-10-09
20192019-04-122019-10-04
20202020-03-292020-09-11
20212021-04-282021-09-20
20222022-04-242022-09-22
20232023-04-062023-09-08
20242024-04-162024-10-07
20252025-03-202025-09-22
20262026-03-082026-08-31

Every Fixed Threshold

Fixed thresholds at Charleston WFO
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3091200753
35 C (95 F): Days161519991
90 F (32.2 C): Days3050200717
100 F (37.8 C): Days2420124
0 C (32 F): Ice days (max3044201021
0 C (32 F): Frost days (min30132201067
-10 C (14 F): Days with min3028200920
-20 C (-4 F): Days with min7720141
20 C (68 F): Tropical nights (min3038202538
10 mm (0.39 in): Days with 10 mm or more rain3053201825
25 mm (0.98 in): Days with 25 mm or more rain301820048
50 mm (1.97 in): Days with 50 mm or more rain19420101
10 cm (3.9 in): Days with 10 cm or more snowfall18420251
25 cm (9.8 in): Days with 25 cm or more snowfall2120161

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 Charleston WFO 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 (2026-10-16).