Superior Threshold Days by Year (USW00024159)

16 fixed thresholds counted per year at Superior (USW00024159): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Superior Thresholds

Superior: days with 10 mm (0.39 in) or more of precipitation in 88 years, most in 1948 with 20.
Superior: nights with a minimum temperature at or below 0 C (32 F) in 84 years, most in 1952 with 210.
Superior: nights with a minimum temperature at or below -10 C (14 F) in 84 years, most in 1949 with 62.
Superior: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1935 with 77.
16 fixed thresholds have at least one qualifying day at Superior.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Superior with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 77 in 1935.

Days at or above 30 C (86 F) per year at Superior
Year	Days	Decade average
1924	40	45.8
1925	60	45.8
1926	54	45.8
1927	33	45.8
1928	42	45.8
1930	59	68.2
1931	67	68.2
1932	60	68.2
1933	70	68.2
1934	71	68.2
1935	77	68.2
1936	76	68.2
1937	62	68.2
1938	69	68.2
1939	71	68.2
1940	75	47.4
1941	54	47.4
1942	49	47.4
1943	48	47.4
1944	43	47.4
1945	50	47.4
1946	35	47.4
1947	39	47.4
1948	25	47.4
1949	56	47.4
1950	39	44.2
1951	34	44.2
1952	42	44.2
1953	43	44.2
1954	33	44.2
1956	47	44.2
1957	52	44.2
1958	67	44.2
1959	41	44.2
1960	48	50.3
1961	73	50.3
1962	38	50.3
1963	66	50.3
1964	31	50.3
1965	34	50.3
1966	57	50.3
1967	66	50.3
1968	34	50.3
1969	56	50.3
1970	59	48.1
1971	51	48.1
1972	49	48.1
1973	60	48.1
1974	56	48.1
1975	37	48.1
1976	39	48.1
1977	47	48.1
1978	33	48.1
1979	50	48.1
1981	46	45.5
1982	35	45.5
1983	31	45.5
1984	50	45.5
1985	43	45.5
1986	57	45.5
1987	46	45.5
1988	56	45.5
1990	54	48.3
1991	40	48.3
1993	20	48.3
1994	61	48.3
1995	64	48.3
1996	50	48.3
1997	40	48.3
1998	57	48.3
2000	51	61
2001	74	61
2002	46	61
2003	67	61
2004	52	61
2005	54	61
2006	71	61
2007	73	61
2008	49	61
2009	73	61
2010	50	64
2011	65	64
2012	77	64

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

First to last qualifying date each year at Superior
Year	First date	Last date
1924	1924-05-11	1924-09-16
1925	1925-06-18	1925-09-03
1926	1926-04-29	1926-08-29
1927	1927-06-06	1927-08-23
1928	1928-05-21	1928-09-18
1930	1930-05-27	1930-09-05
1931	1931-05-12	1931-09-07
1932	1932-06-12	1932-09-17
1933	1933-06-03	1933-09-17
1934	1934-05-14	1934-09-07
1935	1935-05-22	1935-10-03
1936	1936-04-17	1936-09-22
1937	1937-06-02	1937-09-20
1938	1938-05-24	1938-09-30
1939	1939-04-28	1939-09-22
1940	1940-05-10	1940-09-11
1941	1941-05-11	1941-08-23
1942	1942-06-29	1942-09-06
1943	1943-06-27	1943-10-04
1944	1944-05-28	1944-09-12
1945	1945-05-30	1945-09-14
1946	1946-04-25	1946-08-31
1947	1947-05-07	1947-09-04
1948	1948-05-26	1948-09-14
1949	1949-05-08	1949-09-24
1950	1950-06-20	1950-09-04
1951	1951-05-22	1951-09-07
1952	1952-04-25	1952-09-26
1953	1953-06-11	1953-09-15
1954	1954-05-18	1954-09-02
1956	1956-05-18	1956-09-19
1957	1957-04-29	1957-09-27
1958	1958-05-18	1958-09-12
1959	1959-06-02	1959-09-13
1960	1960-05-10	1960-09-11
1961	1961-05-25	1961-09-17
1962	1962-06-19	1962-09-26
1963	1963-05-30	1963-10-03
1964	1964-05-16	1964-08-22
1965	1965-06-10	1965-08-19
1966	1966-05-02	1966-09-23
1967	1967-05-21	1967-09-29
1968	1968-06-18	1968-09-10
1969	1969-06-03	1969-09-17
1970	1970-06-02	1970-09-01
1971	1971-06-21	1971-09-11
1972	1972-05-29	1972-09-04
1973	1973-05-14	1973-09-11
1974	1974-06-11	1974-09-25
1975	1975-07-02	1975-09-22
1976	1976-05-13	1976-09-10
1977	1977-04-24	1977-08-23
1978	1978-06-04	1978-09-05
1979	1979-06-12	1979-09-22
1981	1981-06-26	1981-09-19
1982	1982-06-19	1982-09-08
1983	1983-05-27	1983-09-01
1984	1984-05-29	1984-09-19
1985	1985-06-13	1985-08-30
1986	1986-05-25	1986-08-28
1987	1987-04-27	1987-09-25
1988	1988-05-12	1988-09-06
1990	1990-05-05	1990-09-25
1991	1991-07-03	1991-09-06
1993	1993-05-11	1993-09-10
1994	1994-05-09	1994-09-18
1995	1995-05-29	1995-09-19
1996	1996-06-07	1996-09-12
1997	1997-05-15	1997-09-03
1998	1998-05-02	1998-09-18
2000	2000-06-05	2000-09-16
2001	2001-05-12	2001-10-02
2002	2002-05-19	2002-09-16
2003	2003-05-24	2003-09-06
2004	2004-06-04	2004-09-01
2005	2005-05-28	2005-09-09
2006	2006-05-15	2006-09-13
2007	2007-05-16	2007-09-16
2008	2008-05-17	2008-09-20
2009	2009-05-18	2009-09-27
2010	2010-06-14	2010-09-28
2011	2011-06-22	2011-10-01
2012	2012-04-23	2012-09-22

Every Fixed Threshold

Fixed thresholds at Superior
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	77	1935	77
35 C (95 F): Days	81	31	1998	26
40 C (104 F): Days	11	3	1935	1
90 F (32.2 C): Days	83	59	1935	45
100 F (37.8 C): Days	49	12	1935	4
0 C (32 F): Ice days (max	83	61	1985	18
0 C (32 F): Frost days (min	84	210	1952	159
-10 C (14 F): Days with min	84	62	1949	7
-20 C (-4 F): Days with min	62	25	1949	2
-30 C (-22 F): Days with min	17	8	1930	1
20 C (68 F): Tropical nights (min	4	1	1928	1
10 mm (0.39 in): Days with 10 mm or more rain	88	20	1948	9
25 mm (0.98 in): Days with 25 mm or more rain	50	3	1942	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1953	1
10 cm (3.9 in): Days with 10 cm or more snowfall	53	9	1975	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	1	1937	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

Data for Superior 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).

Superior Threshold Days by Year (USW00024159)

Key Facts for Superior Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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