Monticello Threshold Days by Year (USC00225987)

17 fixed thresholds counted per year at Monticello (USC00225987): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monticello Thresholds

Monticello: days with a maximum temperature at or above 30 C (86 F) in 103 years, most in 1935 with 176.
Monticello: days with a maximum temperature at or above 90 F (32.2 C) in 103 years, most in 2010 with 135.
Monticello: days with a maximum temperature at or above 35 C (95 F) in 101 years, most in 1954 with 87.
Monticello: days with 10 mm (0.39 in) or more of precipitation in 100 years, most in 1923 with 64.
17 fixed thresholds have at least one qualifying day at Monticello.

Days at or above 30 C (86 F)

103 years with a qualifying day

Days per year at Monticello with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 176 in 1935.

Days at or above 30 C (86 F) per year at Monticello
Year	Days	Decade average
1908	136	138
1909	140	138
1910	150	128.8
1912	105	128.8
1913	124	128.8
1914	134	128.8
1915	144	128.8
1916	139	128.8
1917	118	128.8
1918	129	128.8
1919	116	128.8
1920	122	143
1921	136	143
1922	150	143
1923	128	143
1924	144	143
1925	160	143
1926	143	143
1927	162	143
1928	139	143
1929	146	143
1930	133	143.8
1931	140	143.8
1932	122	143.8
1933	158	143.8
1934	147	143.8
1935	176	143.8
1936	149	143.8
1937	143	143.8
1938	140	143.8
1939	130	143.8
1940	109	122.6
1941	140	122.6
1942	129	122.6
1943	140	122.6
1944	131	122.6
1945	120	122.6
1946	93	122.6
1947	128	122.6
1948	100	122.6
1949	136	122.6
1950	123	143
1951	152	143
1952	146	143
1953	150	143
1954	157	143
1955	165	143
1956	146	143
1957	134	143
1958	123	143
1959	134	143
1960	129	131.2
1961	113	131.2
1962	160	131.2
1963	151	131.2
1964	114	131.2
1965	141	131.2
1966	108	131.2
1967	121	131.2
1968	140	131.2
1969	135	131.2
1970	138	130.1
1971	131	130.1
1972	147	130.1
1973	139	130.1
1974	119	130.1
1975	131	130.1
1976	112	130.1
1977	141	130.1
1978	134	130.1
1979	109	130.1
1980	129	113.9
1981	116	113.9
1982	128	113.9
1983	94	113.9
1984	94	113.9
1985	107	113.9
1986	122	113.9
1987	114	113.9
1988	125	113.9
1989	110	113.9
1990	129	139.6
1991	133	139.6
1992	126	139.6
1993	136	139.6
1994	138	139.6
1995	152	139.6
1996	143	139.6
1997	129	139.6
1998	155	139.6
1999	155	139.6
2001	112	134.3
2003	115	134.3
2006	155	134.3
2007	145	134.3
2008	141	134.3
2009	138	134.3
2010	163	153.3
2011	154	153.3
2012	151	153.3
2013	150	153.3
2014	154	153.3
2015	148	153.3

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

First to last qualifying date each year at Monticello
Year	First date	Last date
1908	1908-03-17	1908-10-19
1909	1909-04-17	1909-10-22
1910	1910-03-04	1910-10-20
1912	1912-04-26	1912-10-12
1913	1913-04-18	1913-10-14
1914	1914-04-16	1914-10-23
1915	1915-04-17	1915-11-09
1916	1916-04-30	1916-10-31
1917	1917-01-10	1917-10-29
1918	1918-03-01	1918-10-07
1919	1919-04-24	1919-11-05
1920	1920-04-18	1920-10-23
1921	1921-03-22	1921-11-14
1922	1922-04-06	1922-11-05
1923	1923-04-22	1923-10-16
1924	1924-04-15	1924-10-21
1925	1925-04-14	1925-10-16
1926	1926-04-23	1926-10-20
1927	1927-04-03	1927-11-11
1928	1928-03-29	1928-10-14
1929	1929-03-23	1929-10-30
1930	1930-04-03	1930-10-15
1931	1931-04-17	1931-11-12
1932	1932-02-28	1932-10-18
1933	1933-03-14	1933-10-29
1934	1934-04-03	1934-11-09
1935	1935-03-20	1935-11-10
1936	1936-03-15	1936-11-03
1937	1937-04-17	1937-11-01
1938	1938-04-29	1938-10-16
1939	1939-05-11	1939-10-27
1940	1940-04-02	1940-10-30
1941	1941-05-08	1941-10-24
1942	1942-04-26	1942-10-19
1943	1943-04-10	1943-10-03
1944	1944-04-11	1944-10-31
1945	1945-04-14	1945-10-01
1946	1946-03-30	1946-10-19
1947	1947-05-01	1947-10-20
1948	1948-03-20	1948-09-23
1949	1949-04-25	1949-10-21
1950	1950-04-25	1950-11-01
1951	1951-04-20	1951-10-31
1952	1952-04-01	1952-11-01
1953	1953-04-08	1953-10-22
1954	1954-03-11	1954-10-14
1955	1955-03-05	1955-11-13
1956	1956-02-20	1956-11-05
1957	1957-04-19	1957-09-22
1958	1958-04-24	1958-10-11
1959	1959-05-01	1959-10-14
1960	1960-04-21	1960-10-14
1961	1961-05-06	1961-10-14
1962	1962-04-12	1962-10-21
1963	1963-04-01	1963-10-24
1964	1964-04-24	1964-10-02
1965	1965-04-05	1965-10-18
1966	1966-04-14	1966-10-10
1967	1967-03-12	1967-10-17
1968	1968-04-09	1968-10-31
1969	1969-04-04	1969-10-20
1970	1970-04-18	1970-10-04
1971	1971-04-20	1971-11-02
1972	1972-04-15	1972-11-01
1973	1973-05-10	1973-10-23
1974	1974-03-08	1974-09-29
1975	1975-03-13	1975-11-12
1976	1976-04-13	1976-10-06
1977	1977-04-11	1977-10-03
1978	1978-04-01	1978-10-14
1979	1979-04-02	1979-10-02
1980	1980-04-23	1980-09-30
1981	1981-04-05	1981-10-07
1982	1982-03-16	1982-10-10
1983	1983-05-15	1983-09-21
1984	1984-05-03	1984-10-17
1985	1985-04-30	1985-10-14
1986	1986-04-08	1986-10-06
1987	1987-04-19	1987-09-29
1988	1988-04-05	1988-10-01
1989	1989-03-15	1989-10-04
1990	1990-04-30	1990-10-10
1991	1991-03-23	1991-10-23
1992	1992-04-13	1992-10-27
1993	1993-03-30	1993-10-21
1994	1994-03-24	1994-11-29
1995	1995-03-23	1995-10-24
1996	1996-02-27	1996-10-28
1997	1997-03-29	1997-10-14
1998	1998-05-08	1998-11-02
1999	1999-04-08	1999-10-18
2001	2001-04-03	2001-09-25
2003	2003-04-19	2003-10-25
2006	2006-03-13	2006-10-19
2007	2007-03-25	2007-10-19
2008	2008-03-16	2008-10-17
2009	2009-04-11	2009-10-30
2010	2010-04-06	2010-10-28
2011	2011-03-01	2011-10-28
2012	2012-03-03	2012-11-04
2013	2013-03-19	2013-10-16
2014	2014-04-03	2014-10-14
2015	2015-03-17	2015-10-17

Every Fixed Threshold

Fixed thresholds at Monticello
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	103	176	1935	148
35 C (95 F): Days	101	87	1954	74
40 C (104 F): Days	22	8	1924	6
90 F (32.2 C): Days	103	135	2010	114
100 F (37.8 C): Days	63	47	2011	31
110 F (43.3 C): Days	1	1	1997	1
0 C (32 F): Ice days (max	27	5	1940	1
0 C (32 F): Frost days (min	99	89	1963	30
-10 C (14 F): Days with min	32	7	1962	1
20 C (68 F): Tropical nights (min	99	138	2013	127
25 C (77 F): Days with min	37	30	2014	26
10 mm (0.39 in): Days with 10 mm or more rain	100	64	1923	32
25 mm (0.98 in): Days with 25 mm or more rain	100	31	1961	13
50 mm (1.97 in): Days with 50 mm or more rain	100	12	1973	3
100 mm (3.94 in): Days with 100 mm or more rain	47	4	1973	1
200 mm (7.87 in): Days with 200 mm or more rain	4	1	1974	1
10 cm (3.9 in): Days with 10 cm or more snowfall	2	1	1960	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Monticello 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Monticello Threshold Days by Year (USC00225987)

Key Facts for Monticello Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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