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

Louisville WFO Threshold Days by Year (USC00154958)

18 fixed thresholds counted per year at Louisville WFO (USC00154958): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Louisville WFO Thresholds

  • Louisville WFO: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 2010 with 99.
  • Louisville WFO: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 2010 with 58.
  • Louisville WFO: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 2010 with 39.
  • Louisville WFO: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 2013 with 110.
  • 18 fixed thresholds have at least one qualifying day at Louisville WFO.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Louisville WFO Days per year at Louisville WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2010. 02550751001997: 441998: 741999: 792000: 512001: 642002: 812003: 352004: 442005: 792006: 532007: 862008: 622009: 312010: 992011: 772012: 772013: 592014: 702015: 512016: 892017: 622018: 882019: 942020: 602021: 622022: 652023: 452024: 802025: 771997200020032006200920122015201820212024
Days per year at Louisville WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2010.
Days at or above 30 C (86 F) per year at Louisville WFO
YearDaysDecade average
19974465.7
19987465.7
19997965.7
20005158.6
20016458.6
20028158.6
20033558.6
20044458.6
20057958.6
20065358.6
20078658.6
20086258.6
20093158.6
20109976.6
20117776.6
20127776.6
20135976.6
20147076.6
20155176.6
20168976.6
20176276.6
20188876.6
20199476.6
20206064.8
20216264.8
20226564.8
20234564.8
20248064.8
20257764.8
First to last qualifying date each year at Louisville WFO For each year, a bar from the first to the last day at Louisville WFO meeting 30 C (86 F). 1997: 18 May 1997 to 19 September 19971998: 13 May 1998 to 30 September 19981999: 11 May 1999 to 28 September 19992000: 6 May 2000 to 20 September 20002001: 7 April 2001 to 9 September 20012002: 18 April 2002 to 3 October 20022003: 23 June 2003 to 1 September 20032004: 8 May 2004 to 24 September 20042005: 11 May 2005 to 19 October 20052006: 14 April 2006 to 4 October 20062007: 30 April 2007 to 8 October 20072008: 31 May 2008 to 24 September 20082009: 1 June 2009 to 27 August 20092010: 7 May 2010 to 11 October 20102011: 10 April 2011 to 13 September 20112012: 2 May 2012 to 7 September 20122013: 15 May 2013 to 4 October 20132014: 5 May 2014 to 2 October 20142015: 7 May 2015 to 18 September 20152016: 29 May 2016 to 1 November 20162017: 16 May 2017 to 27 September 20172018: 10 May 2018 to 9 October 20182019: 17 May 2019 to 3 October 20192020: 23 May 2020 to 10 September 20202021: 22 May 2021 to 29 September 20212022: 11 May 2022 to 21 September 20222023: 31 May 2023 to 3 October 20232024: 15 April 2024 to 6 October 20242025: 4 June 2025 to 3 October 202519972001200520092013201720212025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Louisville WFO meeting 30 C (86 F).
First to last qualifying date each year at Louisville WFO
YearFirst dateLast date
19971997-05-181997-09-19
19981998-05-131998-09-30
19991999-05-111999-09-28
20002000-05-062000-09-20
20012001-04-072001-09-09
20022002-04-182002-10-03
20032003-06-232003-09-01
20042004-05-082004-09-24
20052005-05-112005-10-19
20062006-04-142006-10-04
20072007-04-302007-10-08
20082008-05-312008-09-24
20092009-06-012009-08-27
20102010-05-072010-10-11
20112011-04-102011-09-13
20122012-05-022012-09-07
20132013-05-152013-10-04
20142014-05-052014-10-02
20152015-05-072015-09-18
20162016-05-292016-11-01
20172017-05-162017-09-27
20182018-05-102018-10-09
20192019-05-172019-10-03
20202020-05-232020-09-10
20212021-05-222021-09-29
20222022-05-112022-09-21
20232023-05-312023-10-03
20242024-04-152024-10-06
20252025-06-042025-10-03

Every Fixed Threshold

Fixed thresholds at Louisville WFO
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2999201077
35 C (95 F): Days212320124
40 C (104 F): Days2220122
90 F (32.2 C): Days2958201044
100 F (37.8 C): Days510201210
0 C (32 F): Ice days (max2939201024
0 C (32 F): Frost days (min29110201391
-10 C (14 F): Days with min2725201414
-20 C (-4 F): Days with min4220141
20 C (68 F): Tropical nights (min2980201864
25 C (77 F): Days with min10220101
10 mm (0.39 in): Days with 10 mm or more rain2963200648
25 mm (0.98 in): Days with 25 mm or more rain2922201122
50 mm (1.97 in): Days with 50 mm or more rain29720114
100 mm (3.94 in): Days with 100 mm or more rain7119971
200 mm (7.87 in): Days with 200 mm or more rain1119971
10 cm (3.9 in): Days with 10 cm or more snowfall9319982
25 cm (9.8 in): Days with 25 cm or more snowfall1119981

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 Louisville 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 (2025-12-31).