Jefferson 3SE Threshold Days by Year (USC00344573)

20 fixed thresholds counted per year at Jefferson 3SE (USC00344573): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jefferson 3SE Thresholds

Jefferson 3SE: days with 10 mm (0.39 in) or more of precipitation in 122 years, most in 1987 with 43.
Jefferson 3SE: days with 25 mm (0.98 in) or more of precipitation in 122 years, most in 1908 with 19.
Jefferson 3SE: nights with a minimum temperature at or below 0 C (32 F) in 100 years, most in 2007 with 133.
Jefferson 3SE: nights with a minimum temperature at or above 20 C (68 F) in 100 years, most in 1954 with 95.
20 fixed thresholds have at least one qualifying day at Jefferson 3SE.

Days at or above 30 C (86 F)

99 years with a qualifying day

Days per year at Jefferson 3SE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 149 in 1956.

Days at or above 30 C (86 F) per year at Jefferson 3SE
Year	Days	Decade average
1894	122	126
1895	126	126
1896	130	126
1900	104	101.3
1902	114	101.3
1904	93	101.3
1907	103	101.3
1908	80	101.3
1909	114	101.3
1910	127	107.4
1911	124	107.4
1912	100	107.4
1913	108	107.4
1914	114	107.4
1915	68	107.4
1918	111	107.4
1923	95	101.4
1924	96	101.4
1926	108	101.4
1927	96	101.4
1929	112	101.4
1930	121	123.9
1931	123	123.9
1932	126	123.9
1933	137	123.9
1935	98	123.9
1936	123	123.9
1937	125	123.9
1938	127	123.9
1939	135	123.9
1940	119	108.1
1941	103	108.1
1942	91	108.1
1943	114	108.1
1944	109	108.1
1945	103	108.1
1948	119	108.1
1949	107	108.1
1950	98	119.6
1951	100	119.6
1952	130	119.6
1953	136	119.6
1954	134	119.6
1955	122	119.6
1956	149	119.6
1957	93	119.6
1958	118	119.6
1959	116	119.6
1960	114	115
1961	93	115
1962	130	115
1963	144	115
1964	117	115
1965	115	115
1966	112	115
1967	108	115
1968	113	115
1969	104	115
1970	123	114.6
1971	120	114.6
1972	128	114.6
1973	110	114.6
1974	92	114.6
1975	108	114.6
1976	105	114.6
1977	122	114.6
1978	127	114.6
1979	111	114.6
1980	129	114.1
1981	123	114.1
1982	107	114.1
1983	104	114.1
1984	123	114.1
1985	105	114.1
1986	111	114.1
1987	118	114.1
1988	121	114.1
1989	100	114.1
1990	114	112.2
1991	130	112.2
1992	92	112.2
1993	101	112.2
1994	126	112.2
1995	102	112.2
1996	118	112.2
1997	108	112.2
1998	131	112.2
1999	100	112.2
2000	126	108.5
2001	116	108.5
2002	104	108.5
2003	96	108.5
2004	99	108.5
2005	126	108.5
2006	126	108.5
2007	102	108.5
2008	98	108.5
2009	92	108.5
2010	120	120

For each year, a bar from the first to the last day at Jefferson 3SE meeting 30 C (86 F).

First to last qualifying date each year at Jefferson 3SE
Year	First date	Last date
1894	1894-04-12	1894-10-24
1895	1895-03-27	1895-10-18
1896	1896-04-10	1896-10-13
1900	1900-03-11	1900-10-05
1902	1902-04-05	1902-10-25
1904	1904-03-02	1904-10-09
1907	1907-03-19	1907-10-02
1908	1908-03-25	1908-09-21
1909	1909-04-04	1909-10-07
1910	1910-03-05	1910-10-26
1911	1911-02-01	1911-10-14
1912	1912-05-16	1912-10-27
1913	1913-04-02	1913-10-06
1914	1914-03-15	1914-10-04
1915	1915-04-27	1915-10-01
1918	1918-02-23	1918-10-08
1923	1923-04-19	1923-09-28
1924	1924-04-07	1924-10-29
1926	1926-04-16	1926-10-17
1927	1927-04-09	1927-10-27
1929	1929-03-23	1929-10-17
1930	1930-02-23	1930-10-11
1931	1931-05-15	1931-10-24
1932	1932-04-01	1932-10-18
1933	1933-03-13	1933-10-10
1935	1935-05-01	1935-10-16
1936	1936-04-12	1936-09-23
1937	1937-04-14	1937-10-30
1938	1938-04-19	1938-10-31
1939	1939-04-23	1939-10-26
1940	1940-03-31	1940-10-25
1941	1941-05-14	1941-10-13
1942	1942-04-04	1942-09-18
1943	1943-04-03	1943-10-18
1944	1944-05-14	1944-10-15
1945	1945-05-06	1945-11-06
1948	1948-04-06	1948-10-15
1949	1949-04-24	1949-10-08
1950	1950-03-25	1950-10-31
1951	1951-03-22	1951-10-04
1952	1952-04-07	1952-10-26
1953	1953-03-20	1953-10-13
1954	1954-04-06	1954-10-14
1955	1955-03-10	1955-12-24
1956	1956-03-05	1956-10-12
1957	1957-05-29	1957-10-05
1958	1958-04-23	1958-10-19
1959	1959-03-24	1959-10-25
1960	1960-04-06	1960-10-10
1961	1961-04-19	1961-09-29
1962	1962-02-12	1962-10-15
1963	1963-03-28	1963-10-18
1964	1964-04-12	1964-10-16
1965	1965-04-21	1965-10-11
1966	1966-03-31	1966-10-14
1967	1967-03-10	1967-10-06
1968	1968-04-30	1968-10-30
1969	1969-05-20	1969-10-03
1970	1970-04-27	1970-10-07
1971	1971-03-12	1971-10-12
1972	1972-04-06	1972-10-12
1973	1973-05-10	1973-10-24
1974	1974-03-31	1974-09-12
1975	1975-04-16	1975-10-21
1976	1976-03-25	1976-10-11
1977	1977-04-08	1977-10-28
1978	1978-04-06	1978-10-21
1979	1979-05-27	1979-10-21
1980	1980-04-20	1980-11-08
1981	1981-02-20	1981-10-05
1982	1982-04-12	1982-10-18
1983	1983-05-06	1983-10-05
1984	1984-04-26	1984-10-06
1985	1985-04-18	1985-09-19
1986	1986-03-28	1986-09-28
1987	1987-04-17	1987-09-27
1988	1988-05-10	1988-10-17
1989	1989-03-10	1989-10-02
1990	1990-04-22	1990-10-06
1991	1991-03-05	1991-10-23
1992	1992-05-01	1992-10-23
1993	1993-05-27	1993-10-06
1994	1994-03-17	1994-10-02
1995	1995-03-22	1995-10-22
1996	1996-02-22	1996-10-16
1997	1997-03-21	1997-10-07
1998	1998-04-25	1998-09-30
1999	1999-04-20	1999-10-16
2000	2000-04-05	2000-10-04
2001	2001-04-27	2001-10-24
2002	2002-04-18	2002-10-02
2003	2003-05-01	2003-10-24
2004	2004-04-17	2004-09-28
2005	2005-04-21	2005-10-19
2006	2006-04-02	2006-11-09
2007	2007-05-05	2007-10-14
2008	2008-05-02	2008-10-02
2009	2009-03-06	2009-10-01
2010	2010-04-01	2010-10-18

Every Fixed Threshold

Fixed thresholds at Jefferson 3SE
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	99	149	1956	120
35 C (95 F): Days	99	103	1956	49
40 C (104 F): Days	87	45	1936	8
45 C (113 F): Days	7	7	1936	1
90 F (32.2 C): Days	99	133	1956	94
100 F (37.8 C): Days	98	71	1954	20
110 F (43.3 C): Days	31	18	1936	2
0 C (32 F): Ice days (max	98	31	1895	13
0 C (32 F): Frost days (min	100	133	2007	128
-10 C (14 F): Days with min	99	38	1895	20
-20 C (-4 F): Days with min	35	7	1930	1
20 C (68 F): Tropical nights (min	100	95	1954	63
25 C (77 F): Days with min	84	30	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	122	43	1987	19
25 mm (0.98 in): Days with 25 mm or more rain	122	19	1908	6
50 mm (1.97 in): Days with 50 mm or more rain	98	7	1998	1
100 mm (3.94 in): Days with 100 mm or more rain	20	2	1986	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	56	5	1940	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

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Data for Jefferson 3SE 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Jefferson 3SE Threshold Days by Year (USC00344573)

Key Facts for Jefferson 3SE Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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