Superior Threshold Days by Year

13 fixed thresholds counted per year at Superior (USC00028348): 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 82 years, most in 1992 with 40.
Superior: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1941 with 11.
Superior: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1973 with 173.
Superior: days with a maximum temperature at or above 35 C (95 F) in 43 years, most in 2003 with 110.
13 fixed thresholds have at least one qualifying day at Superior.

Days at or above 30 C (86 F)

43 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 173 in 1973.

Days at or above 30 C (86 F) per year at Superior
Year	Days	Decade average
1954	169	151.3
1955	148	151.3
1956	160	151.3
1957	133	151.3
1958	146	151.3
1959	152	151.3
1960	155	146.8
1961	152	146.8
1962	146	146.8
1963	155	146.8
1964	142	146.8
1965	145	146.8
1966	143	146.8
1967	144	146.8
1968	133	146.8
1969	153	146.8
1970	146	152
1971	133	152
1972	162	152
1973	173	152
1974	166	152
1975	142	152
1976	155	152
1977	150	152
1978	145	152
1979	148	152
1983	131	136.7
1984	131	136.7
1985	111	136.7
1986	129	136.7
1988	154	136.7
1989	164	136.7
1990	139	141.3
1991	149	141.3
1992	144	141.3
1993	123	141.3
1994	133	141.3
1995	128	141.3
1999	173	141.3
2000	160	163.5
2001	170	163.5
2002	163	163.5
2003	161	163.5

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
1954	1954-04-17	1954-10-24
1955	1955-04-25	1955-10-21
1956	1956-03-25	1956-10-23
1957	1957-05-02	1957-10-11
1958	1958-04-21	1958-10-19
1959	1959-04-02	1959-10-28
1960	1960-04-06	1960-10-09
1961	1961-04-04	1961-10-22
1962	1962-04-13	1962-10-25
1963	1963-02-07	1963-10-16
1964	1964-04-15	1964-10-15
1965	1965-04-21	1965-10-31
1966	1966-05-02	1966-10-23
1967	1967-05-08	1967-11-16
1968	1968-05-01	1968-10-30
1969	1969-03-30	1969-10-11
1970	1970-05-04	1970-10-29
1971	1971-03-29	1971-10-14
1972	1972-03-07	1972-10-17
1973	1973-04-26	1973-11-18
1974	1974-04-14	1974-10-21
1975	1975-05-13	1975-11-06
1976	1976-05-01	1976-10-13
1977	1977-04-08	1977-10-27
1978	1978-05-10	1978-10-22
1979	1979-04-23	1979-10-27
1983	1983-05-08	1983-10-08
1984	1984-04-14	1984-10-09
1985	1985-04-08	1985-10-28
1986	1986-03-28	1986-10-09
1988	1988-03-26	1988-11-06
1989	1989-03-10	1989-10-15
1990	1990-04-14	1990-11-01
1991	1991-05-07	1991-10-21
1992	1992-04-13	1992-10-21
1993	1993-04-22	1993-10-24
1994	1994-04-16	1994-10-14
1995	1995-05-05	1995-10-29
1999	1999-04-19	1999-11-17
2000	2000-04-05	2000-10-08
2001	2001-04-17	2001-11-04
2002	2002-04-01	2002-10-17
2003	2003-05-12	2003-10-26

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	43	173	1973	161
35 C (95 F): Days	43	110	2003	110
40 C (104 F): Days	41	20	1974	14
90 F (32.2 C): Days	43	146	2000	145
100 F (37.8 C): Days	43	64	2002	50
110 F (43.3 C): Days	6	3	1995	3
0 C (32 F): Frost days (min	39	20	1988	4
20 C (68 F): Tropical nights (min	43	146	2003	146
25 C (77 F): Days with min	43	59	1994	51
10 mm (0.39 in): Days with 10 mm or more rain	82	40	1992	18
25 mm (0.98 in): Days with 25 mm or more rain	79	11	1941	4
50 mm (1.97 in): Days with 50 mm or more rain	28	3	1978	2
10 cm (3.9 in): Days with 10 cm or more snowfall	12	1	1922	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

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

Key Facts for Superior Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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