Louisville Intl AP Threshold Days by Year

18 fixed thresholds counted per year at Louisville Intl AP (USW00093821): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Louisville Intl AP Thresholds

Louisville Intl AP: days with a maximum temperature at or above 30 C (86 F) in 79 years, most in 2010 with 118.
Louisville Intl AP: days with a maximum temperature at or above 90 F (32.2 C) in 79 years, most in 2010 with 85.
Louisville Intl AP: days with a maximum temperature at or below 0 C (32 F) in 79 years, most in 1978 with 41.
Louisville Intl AP: nights with a minimum temperature at or below 0 C (32 F) in 79 years, most in 1960 with 119.
18 fixed thresholds have at least one qualifying day at Louisville Intl AP.

Days at or above 30 C (86 F)

79 years with a qualifying day

Days per year at Louisville Intl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 118 in 2010.

Days at or above 30 C (86 F) per year at Louisville Intl AP
Year	Days	Decade average
1948	84	83.5
1949	83	83.5
1950	50	83.2
1951	85	83.2
1952	94	83.2
1953	103	83.2
1954	101	83.2
1955	94	83.2
1956	70	83.2
1957	57	83.2
1958	71	83.2
1959	107	83.2
1960	61	61.1
1961	64	61.1
1962	71	61.1
1963	55	61.1
1964	75	61.1
1965	58	61.1
1966	64	61.1
1967	45	61.1
1968	57	61.1
1969	61	61.1
1970	66	61
1971	60	61
1972	58	61
1973	68	61
1974	31	61
1975	79	61
1976	47	61
1977	77	61
1978	74	61
1979	50	61
1980	85	69.1
1981	58	69.1
1982	42	69.1
1983	82	69.1
1984	67	69.1
1985	50	69.1
1986	75	69.1
1987	89	69.1
1988	82	69.1
1989	61	69.1
1990	74	73.9
1991	103	73.9
1992	46	73.9
1993	81	73.9
1994	80	73.9
1995	76	73.9
1996	53	73.9
1997	59	73.9
1998	87	73.9
1999	80	73.9
2000	55	72
2001	71	72
2002	95	72
2003	46	72
2004	64	72
2005	86	72
2006	63	72
2007	107	72
2008	89	72
2009	44	72
2010	118	92
2011	91	92
2012	83	92
2013	64	92
2014	82	92
2015	80	92
2016	103	92
2017	88	92
2018	109	92
2019	102	92
2020	79	84.3
2021	86	84.3
2022	89	84.3
2023	77	84.3
2024	97	84.3
2025	83	84.3
2026	79	84.3

For each year, a bar from the first to the last day at Louisville Intl AP meeting 30 C (86 F).

First to last qualifying date each year at Louisville Intl AP
Year	First date	Last date
1948	1948-04-24	1948-09-21
1949	1949-05-03	1949-10-10
1950	1950-05-04	1950-10-17
1951	1951-04-28	1951-10-05
1952	1952-05-01	1952-10-01
1953	1953-05-03	1953-10-21
1954	1954-04-25	1954-10-12
1955	1955-04-18	1955-09-29
1956	1956-05-12	1956-09-22
1957	1957-05-11	1957-09-11
1958	1958-04-18	1958-09-26
1959	1959-04-07	1959-10-05
1960	1960-04-16	1960-09-08
1961	1961-06-01	1961-09-25
1962	1962-04-30	1962-09-13
1963	1963-04-21	1963-10-20
1964	1964-05-18	1964-09-20
1965	1965-05-08	1965-10-17
1966	1966-05-08	1966-09-03
1967	1967-05-25	1967-09-20
1968	1968-06-06	1968-09-23
1969	1969-05-05	1969-10-13
1970	1970-04-29	1970-09-23
1971	1971-06-03	1971-10-03
1972	1972-05-25	1972-09-21
1973	1973-06-03	1973-10-04
1974	1974-05-17	1974-08-26
1975	1975-04-28	1975-10-13
1976	1976-04-20	1976-09-08
1977	1977-04-18	1977-09-18
1978	1978-04-09	1978-09-21
1979	1979-05-08	1979-10-21
1980	1980-04-22	1980-10-10
1981	1981-03-31	1981-09-30
1982	1982-05-11	1982-10-06
1983	1983-06-11	1983-10-03
1984	1984-05-25	1984-09-22
1985	1985-04-22	1985-09-22
1986	1986-04-25	1986-10-04
1987	1987-04-21	1987-09-28
1988	1988-04-05	1988-09-13
1989	1989-04-25	1989-10-13
1990	1990-04-24	1990-09-07
1991	1991-05-14	1991-09-30
1992	1992-05-16	1992-09-21
1993	1993-05-08	1993-09-14
1994	1994-04-25	1994-09-16
1995	1995-05-24	1995-09-14
1996	1996-05-09	1996-09-11
1997	1997-05-18	1997-10-12
1998	1998-05-13	1998-10-06
1999	1999-05-11	1999-09-28
2000	2000-05-07	2000-09-20
2001	2001-04-07	2001-09-09
2002	2002-04-16	2002-10-03
2003	2003-05-10	2003-09-01
2004	2004-04-18	2004-09-24
2005	2005-05-11	2005-10-19
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-10-08
2008	2008-05-27	2008-10-12
2009	2009-04-24	2009-09-16
2010	2010-04-06	2010-10-11
2011	2011-04-10	2011-09-14
2012	2012-05-02	2012-09-07
2013	2013-04-10	2013-10-04
2014	2014-05-05	2014-10-02
2015	2015-05-05	2015-09-24
2016	2016-04-18	2016-10-19
2017	2017-04-14	2017-09-27
2018	2018-05-02	2018-10-09
2019	2019-05-08	2019-10-03
2020	2020-05-23	2020-09-12
2021	2021-05-20	2021-10-10
2022	2022-04-23	2022-09-21
2023	2023-04-20	2023-10-04
2024	2024-04-15	2024-10-06
2025	2025-04-28	2025-10-02
2026	2026-03-22	2026-10-12

Every Fixed Threshold

Fixed thresholds at Louisville Intl AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	79	118	2010	79
35 C (95 F): Days	63	39	1954	15
40 C (104 F): Days	5	4	2012	4
90 F (32.2 C): Days	79	85	2010	44
100 F (37.8 C): Days	21	10	1954	1
0 C (32 F): Ice days (max	79	41	1978	19
0 C (32 F): Frost days (min	79	119	1960	45
-10 C (14 F): Days with min	74	36	1977	14
-20 C (-4 F): Days with min	19	5	1989	1
-30 C (-22 F): Days with min	1	1	1994	1
20 C (68 F): Tropical nights (min	79	122	2018	89
25 C (77 F): Days with min	50	17	2010	14
10 mm (0.39 in): Days with 10 mm or more rain	79	56	2011	27
25 mm (0.98 in): Days with 25 mm or more rain	79	22	2011	10
50 mm (1.97 in): Days with 50 mm or more rain	69	8	2011	1
100 mm (3.94 in): Days with 100 mm or more rain	14	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	3	1964	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	2	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Louisville Intl AP 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Louisville Intl AP Threshold Days by Year

Key Facts for Louisville Intl AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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