Monroe Threshold Days by Year (USC00205558)

17 fixed thresholds counted per year at Monroe (USC00205558): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monroe Thresholds

Monroe: days with a maximum temperature at or above 30 C (86 F) in 79 years, most in 1930 with 69.
Monroe: days with a maximum temperature at or above 90 F (32.2 C) in 79 years, most in 1988 with 51.
Monroe: days with a maximum temperature at or below 0 C (32 F) in 79 years, most in 1978 with 65.
Monroe: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 1978 with 156.
17 fixed thresholds have at least one qualifying day at Monroe.

Days at or above 30 C (86 F)

79 years with a qualifying day

Days per year at Monroe with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 69 in 1930.

Days at or above 30 C (86 F) per year at Monroe
Year	Days	Decade average
1918	38	42.5
1919	47	42.5
1920	27	44.4
1921	62	44.4
1922	33	44.4
1923	41	44.4
1924	39	44.4
1925	55	44.4
1926	42	44.4
1927	51	44.4
1928	45	44.4
1929	49	44.4
1930	69	47.8
1931	59	47.8
1932	35	47.8
1933	48	47.8
1934	49	47.8
1935	36	47.8
1936	49	47.8
1937	34	47.8
1938	43	47.8
1939	56	47.8
1940	39	44.5
1941	55	44.5
1942	43	44.5
1943	52	44.5
1944	53	44.5
1945	38	44.5
1946	46	44.5
1947	45	44.5
1948	34	44.5
1949	40	44.5
1950	23	31.9
1951	20	31.9
1952	43	31.9
1953	39	31.9
1954	31	31.9
1955	50	31.9
1956	30	31.9
1957	24	31.9
1958	17	31.9
1959	42	31.9
1960	23	35.9
1961	33	35.9
1962	43	35.9
1963	44	35.9
1964	55	35.9
1965	40	35.9
1966	44	35.9
1967	23	35.9
1968	25	35.9
1969	29	35.9
1970	38	41.8
1971	39	41.8
1973	22	41.8
1974	46	41.8
1975	45	41.8
1976	47	41.8
1977	49	41.8
1978	53	41.8
1979	37	41.8
1980	46	45.8
1981	28	45.8
1983	62	45.8
1984	42	45.8
1985	38	45.8
1986	36	45.8
1987	61	45.8
1988	62	45.8
1989	37	45.8
1990	40	36.4
1991	67	36.4
1992	16	36.4
1993	47	36.4
1994	45	36.4
1996	25	36.4
1997	14	36.4
1999	37	36.4
2000	14	14

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

First to last qualifying date each year at Monroe
Year	First date	Last date
1918	1918-05-05	1918-08-26
1919	1919-06-01	1919-10-03
1920	1920-06-08	1920-10-21
1921	1921-05-21	1921-09-29
1922	1922-05-11	1922-10-06
1923	1923-06-01	1923-09-27
1924	1924-06-19	1924-09-02
1925	1925-04-22	1925-09-20
1926	1926-05-06	1926-10-04
1927	1927-05-09	1927-11-11
1928	1928-05-03	1928-10-12
1929	1929-04-05	1929-09-28
1930	1930-04-11	1930-09-22
1931	1931-05-18	1931-10-05
1932	1932-05-15	1932-09-19
1933	1933-05-24	1933-09-24
1934	1934-05-04	1934-09-26
1935	1935-06-13	1935-09-25
1936	1936-05-07	1936-09-23
1937	1937-05-31	1937-10-01
1938	1938-05-03	1938-10-17
1939	1939-05-07	1939-10-10
1940	1940-05-15	1940-10-07
1941	1941-04-14	1941-10-07
1942	1942-05-01	1942-09-19
1943	1943-06-03	1943-09-06
1944	1944-05-27	1944-09-28
1945	1945-06-14	1945-09-10
1946	1946-06-09	1946-10-08
1947	1947-06-11	1947-09-20
1948	1948-06-04	1948-09-20
1949	1949-05-05	1949-10-10
1950	1950-06-07	1950-08-28
1951	1951-05-16	1951-10-05
1952	1952-05-05	1952-10-01
1953	1953-05-30	1953-10-19
1954	1954-06-10	1954-09-07
1955	1955-05-03	1955-09-20
1956	1956-05-22	1956-09-14
1957	1957-06-16	1957-09-02
1958	1958-06-30	1958-09-06
1959	1959-06-08	1959-09-28
1960	1960-04-23	1960-09-09
1961	1961-06-10	1961-09-23
1962	1962-04-26	1962-09-14
1963	1963-05-08	1963-10-08
1964	1964-05-19	1964-09-11
1965	1965-05-08	1965-09-22
1966	1966-05-27	1966-09-03
1967	1967-06-08	1967-08-29
1968	1968-06-06	1968-09-23
1969	1969-05-28	1969-09-15
1970	1970-05-19	1970-09-21
1971	1971-05-18	1971-09-28
1973	1973-06-09	1973-09-05
1974	1974-06-04	1974-09-13
1975	1975-05-20	1975-08-26
1976	1976-04-17	1976-09-15
1977	1977-05-14	1977-09-10
1978	1978-05-28	1978-09-21
1979	1979-05-08	1979-09-07
1980	1980-04-23	1980-09-23
1981	1981-06-06	1981-09-14
1983	1983-06-11	1983-09-20
1984	1984-05-19	1984-09-23
1985	1985-04-20	1985-09-09
1986	1986-05-31	1986-09-30
1987	1987-04-22	1987-09-28
1988	1988-05-16	1988-08-18
1989	1989-05-25	1989-09-10
1990	1990-04-25	1990-09-07
1991	1991-04-08	1991-09-16
1992	1992-05-13	1992-09-16
1993	1993-05-12	1993-09-15
1994	1994-04-26	1994-09-21
1996	1996-05-19	1996-08-24
1997	1997-06-21	1997-08-17
1999	1999-05-18	1999-09-28
2000	2000-05-07	2000-08-16

Every Fixed Threshold

Fixed thresholds at Monroe
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	79	69	1930	14
35 C (95 F): Days	68	33	1988	3
40 C (104 F): Days	4	2	1930	1
90 F (32.2 C): Days	79	51	1988	1
100 F (37.8 C): Days	24	12	1988	1
0 C (32 F): Ice days (max	79	65	1978	53
0 C (32 F): Frost days (min	78	156	1978	116
-10 C (14 F): Days with min	78	61	1978	36
-20 C (-4 F): Days with min	50	12	1918	2
20 C (68 F): Tropical nights (min	78	38	1959	17
25 C (77 F): Days with min	11	3	1988	3
10 mm (0.39 in): Days with 10 mm or more rain	72	40	1977	19
25 mm (0.98 in): Days with 25 mm or more rain	72	12	1937	8
50 mm (1.97 in): Days with 50 mm or more rain	38	2	1929	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1987	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	9	1977	2
25 cm (9.8 in): Days with 25 cm or more snowfall	7	2	1992	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1918.

Download the Data

Data for Monroe 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).

Monroe Threshold Days by Year (USC00205558)

Key Facts for Monroe Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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