Louisville Threshold Days by Year (USC00225247)

18 fixed thresholds counted per year at Louisville (USC00225247): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Louisville Thresholds

Louisville: nights with a minimum temperature at or below 0 C (32 F) in 118 years, most in 1963 with 83.
Louisville: nights with a minimum temperature at or above 20 C (68 F) in 118 years, most in 1911 with 105.
Louisville: days with a maximum temperature at or above 30 C (86 F) in 114 years, most in 1925 with 149.
Louisville: days with a maximum temperature at or above 90 F (32.2 C) in 114 years, most in 1954 with 122.
18 fixed thresholds have at least one qualifying day at Louisville.

Days at or above 30 C (86 F)

114 years with a qualifying day

Days per year at Louisville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 1925.

Days at or above 30 C (86 F) per year at Louisville
Year	Days	Decade average
1893	118	116.6
1894	108	116.6
1895	119	116.6
1896	86	116.6
1897	131	116.6
1898	107	116.6
1899	147	116.6
1900	111	113.2
1901	103	113.2
1902	126	113.2
1903	114	113.2
1904	128	113.2
1905	102	113.2
1906	107	113.2
1907	108	113.2
1908	122	113.2
1909	111	113.2
1910	117	115.8
1911	123	115.8
1912	102	115.8
1913	113	115.8
1914	125	115.8
1915	118	115.8
1916	116	115.8
1917	112	115.8
1918	126	115.8
1919	106	115.8
1920	110	125.4
1921	135	125.4
1922	114	125.4
1924	117	125.4
1925	149	125.4
1926	108	125.4
1927	136	125.4
1928	128	125.4
1929	132	125.4
1930	119	112
1932	108	112
1933	121	112
1934	113	112
1935	87	112
1936	124	112
1940	104	113
1941	135	113
1942	102	113
1943	119	113
1944	114	113
1945	115	113
1946	84	113
1947	117	113
1948	123	113
1949	117	113
1950	99	121.9
1951	133	121.9
1952	131	121.9
1953	139	121.9
1954	138	121.9
1955	139	121.9
1956	114	121.9
1957	112	121.9
1958	96	121.9
1959	118	121.9
1960	106	94.8
1961	89	94.8
1962	123	94.8
1963	101	94.8
1964	99	94.8
1965	112	94.8
1966	84	94.8
1967	59	94.8
1968	79	94.8
1969	96	94.8
1970	101	93.9
1971	92	93.9
1972	110	93.9
1973	105	93.9
1974	88	93.9
1975	87	93.9
1976	71	93.9
1977	105	93.9
1978	106	93.9
1979	74	93.9
1980	110	98.3
1981	99	98.3
1982	88	98.3
1983	79	98.3
1984	99	98.3
1985	100	98.3
1986	117	98.3
1987	112	98.3
1988	98	98.3
1989	81	98.3
1990	110	93.4
1991	101	93.4
1992	73	93.4
1993	106	93.4
1994	76	93.4
1995	106	93.4
1996	93	93.4
1997	82	93.4
2003	84	104
2004	81	104
2005	122	104
2006	132	104
2007	130	104
2008	91	104
2009	88	104
2010	138	115.1
2011	120	115.1
2012	113	115.1
2013	104	115.1
2014	106	115.1
2015	115	115.1
2017	110	115.1

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

First to last qualifying date each year at Louisville
Year	First date	Last date
1893	1893-04-05	1893-10-11
1894	1894-04-16	1894-10-24
1895	1895-04-28	1895-10-06
1896	1896-04-22	1896-11-11
1897	1897-04-28	1897-10-17
1898	1898-05-12	1898-09-23
1899	1899-04-26	1899-10-27
1900	1900-04-24	1900-10-28
1901	1901-04-29	1901-10-02
1902	1902-04-21	1902-10-26
1903	1903-05-20	1903-10-22
1904	1904-05-05	1904-10-19
1905	1905-04-26	1905-10-17
1906	1906-04-10	1906-10-22
1907	1907-03-20	1907-10-07
1908	1908-03-17	1908-10-20
1909	1909-05-07	1909-11-04
1910	1910-03-24	1910-10-20
1911	1911-03-11	1911-10-15
1912	1912-05-09	1912-10-12
1913	1913-04-18	1913-10-10
1914	1914-04-17	1914-10-12
1915	1915-04-17	1915-10-16
1916	1916-04-15	1916-10-15
1917	1917-04-17	1917-10-17
1918	1918-04-03	1918-10-08
1919	1919-04-08	1919-10-27
1920	1920-04-17	1920-10-21
1921	1921-05-13	1921-10-26
1922	1922-04-06	1922-10-04
1924	1924-05-04	1924-10-19
1925	1925-04-14	1925-10-16
1926	1926-04-23	1926-10-19
1927	1927-04-07	1927-10-30
1928	1928-03-26	1928-10-14
1929	1929-03-23	1929-10-18
1930	1930-04-11	1930-09-30
1932	1932-04-20	1932-09-18
1933	1933-05-07	1933-10-05
1934	1934-04-04	1934-10-22
1935	1935-04-25	1935-09-24
1936	1936-04-14	1936-10-22
1940	1940-04-02	1940-10-27
1941	1941-04-13	1941-10-23
1942	1942-04-18	1942-10-19
1943	1943-04-11	1943-10-01
1944	1944-04-15	1944-10-06
1945	1945-05-15	1945-10-02
1946	1946-04-01	1946-09-21
1947	1947-05-04	1947-10-21
1948	1948-04-07	1948-09-22
1949	1949-04-24	1949-10-11
1950	1950-05-05	1950-09-21
1951	1951-04-27	1951-10-06
1952	1952-04-29	1952-10-06
1953	1953-04-08	1953-10-23
1954	1954-04-07	1954-10-14
1955	1955-03-11	1955-10-23
1956	1956-04-28	1956-09-30
1957	1957-04-28	1957-09-23
1958	1958-05-15	1958-09-27
1959	1959-05-02	1959-10-11
1960	1960-04-24	1960-10-03
1961	1961-05-06	1961-10-01
1962	1962-04-30	1962-10-11
1963	1963-04-01	1963-10-14
1964	1964-04-24	1964-09-23
1965	1965-04-10	1965-10-16
1966	1966-05-24	1966-10-10
1967	1967-05-12	1967-09-20
1968	1968-05-24	1968-09-26
1969	1969-05-22	1969-10-13
1970	1970-04-23	1970-10-03
1971	1971-05-20	1971-10-05
1972	1972-04-14	1972-10-18
1973	1973-05-11	1973-10-11
1974	1974-04-01	1974-09-21
1975	1975-04-25	1975-10-14
1976	1976-05-31	1976-10-05
1977	1977-05-08	1977-10-02
1978	1978-04-01	1978-10-13
1979	1979-05-11	1979-09-08
1980	1980-04-23	1980-10-11
1981	1981-05-25	1981-10-06
1982	1982-05-13	1982-10-06
1983	1983-05-14	1983-09-19
1984	1984-05-08	1984-10-31
1985	1985-05-01	1985-10-15
1986	1986-04-08	1986-10-05
1987	1987-04-20	1987-09-29
1988	1988-04-06	1988-09-25
1989	1989-04-27	1989-09-14
1990	1990-05-01	1990-10-17
1991	1991-05-14	1991-09-19
1992	1992-04-24	1992-09-22
1993	1993-05-06	1993-09-26
1994	1994-04-21	1994-09-30
1995	1995-03-23	1995-09-21
1996	1996-02-24	1996-09-24
1997	1997-03-29	1997-10-12
2003	2003-05-03	2003-10-25
2004	2004-03-21	2004-10-27
2005	2005-05-13	2005-10-21
2006	2006-04-03	2006-10-18
2007	2007-03-24	2007-10-09
2008	2008-05-10	2008-09-13
2009	2009-04-24	2009-10-10
2010	2010-04-17	2010-10-13
2011	2011-04-08	2011-10-08
2012	2012-03-18	2012-10-13
2013	2013-05-21	2013-10-06
2014	2014-05-05	2014-10-13
2015	2015-04-04	2015-10-16
2017	2017-03-21	2017-10-15

Every Fixed Threshold

Fixed thresholds at Louisville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	114	149	1925	110
35 C (95 F): Days	106	83	1954	8
40 C (104 F): Days	12	8	1930	2
90 F (32.2 C): Days	114	122	1954	58
100 F (37.8 C): Days	48	28	1954	5
0 C (32 F): Ice days (max	76	14	1978	1
0 C (32 F): Frost days (min	118	83	1963	39
-10 C (14 F): Days with min	79	13	1963	6
-20 C (-4 F): Days with min	1	1	1899	1
20 C (68 F): Tropical nights (min	118	105	1911	88
25 C (77 F): Days with min	33	5	1901	1
10 mm (0.39 in): Days with 10 mm or more rain	114	64	1983	39
25 mm (0.98 in): Days with 25 mm or more rain	114	32	1974	15
50 mm (1.97 in): Days with 50 mm or more rain	114	14	1983	4
100 mm (3.94 in): Days with 100 mm or more rain	36	3	1979	1
200 mm (7.87 in): Days with 200 mm or more rain	1	2	1979	2
10 cm (3.9 in): Days with 10 cm or more snowfall	7	2	1997	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1940	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Louisville 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Louisville Threshold Days by Year (USC00225247)

Key Facts for Louisville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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