Ishpeming Threshold Days by Year (USC00204127)

17 fixed thresholds counted per year at Ishpeming (USC00204127): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ishpeming Thresholds

Ishpeming: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1903 with 39.
Ishpeming: days with 25 mm (0.98 in) or more of precipitation in 82 years, most in 1903 with 14.
Ishpeming: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 1926 with 124.
Ishpeming: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 1926 with 214.
17 fixed thresholds have at least one qualifying day at Ishpeming.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Ishpeming with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 33 in 1983.

Days at or above 30 C (86 F) per year at Ishpeming
Year	Days	Decade average
1900	13	7.8
1901	12	7.8
1903	3	7.8
1904	3	7.8
1912	9	9.3
1913	11	9.3
1914	10	9.3
1915	4	9.3
1917	9	9.3
1918	4	9.3
1919	18	9.3
1921	30	12
1922	12	12
1923	9	12
1924	4	12
1925	15	12
1926	4	12
1927	6	12
1929	16	12
1930	11	13.8
1931	27	13.8
1932	9	13.8
1933	19	13.8
1934	14	13.8
1935	12	13.8
1936	12	13.8
1937	19	13.8
1938	4	13.8
1939	11	13.8
1940	9	12.7
1941	22	12.7
1942	6	12.7
1943	10	12.7
1944	12	12.7
1945	8	12.7
1947	20	12.7
1948	10	12.7
1949	17	12.7
1950	2	9.4
1952	7	9.4
1953	13	9.4
1954	7	9.4
1955	26	9.4
1956	6	9.4
1957	10	9.4
1958	2	9.4
1959	12	9.4
1960	4	10.4
1961	11	10.4
1962	8	10.4
1963	13	10.4
1964	17	10.4
1965	8	10.4
1966	14	10.4
1967	2	10.4
1968	8	10.4
1969	19	10.4
1970	23	12.7
1971	9	12.7
1972	6	12.7
1973	10	12.7
1974	7	12.7
1975	23	12.7
1976	22	12.7
1977	14	12.7
1978	8	12.7
1979	5	12.7
1980	19	11.4
1981	6	11.4
1982	4	11.4
1983	33	11.4
1984	2	11.4
1985	2	11.4
1986	14	11.4

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

First to last qualifying date each year at Ishpeming
Year	First date	Last date
1900	1900-05-13	1900-09-01
1901	1901-06-25	1901-09-04
1903	1903-07-07	1903-07-24
1904	1904-07-16	1904-07-18
1912	1912-06-22	1912-09-05
1913	1913-06-15	1913-09-06
1914	1914-05-26	1914-08-09
1915	1915-04-24	1915-09-04
1917	1917-07-21	1917-07-31
1918	1918-05-05	1918-08-25
1919	1919-05-28	1919-09-07
1921	1921-05-20	1921-09-02
1922	1922-05-11	1922-10-04
1923	1923-06-03	1923-09-27
1924	1924-07-05	1924-08-29
1925	1925-05-30	1925-09-03
1926	1926-05-16	1926-08-02
1927	1927-06-28	1927-09-15
1929	1929-05-29	1929-09-04
1930	1930-07-16	1930-08-31
1931	1931-06-18	1931-09-12
1932	1932-05-15	1932-08-31
1933	1933-06-06	1933-09-05
1934	1934-05-31	1934-08-18
1935	1935-07-04	1935-08-19
1936	1936-05-07	1936-08-09
1937	1937-06-24	1937-09-23
1938	1938-06-21	1938-08-14
1939	1939-05-30	1939-09-16
1940	1940-07-05	1940-08-17
1941	1941-05-19	1941-09-21
1942	1942-07-12	1942-08-22
1943	1943-06-19	1943-08-13
1944	1944-05-28	1944-08-15
1945	1945-06-22	1945-09-08
1947	1947-06-28	1947-09-09
1948	1948-06-02	1948-09-12
1949	1949-05-03	1949-08-26
1950	1950-06-08	1950-06-23
1952	1952-04-28	1952-09-13
1953	1953-05-09	1953-09-03
1954	1954-06-09	1954-08-24
1955	1955-05-03	1955-10-10
1956	1956-06-09	1956-08-17
1957	1957-06-17	1957-08-08
1958	1958-06-29	1958-08-09
1959	1959-06-07	1959-08-26
1960	1960-07-08	1960-09-07
1961	1961-06-28	1961-09-10
1962	1962-05-15	1962-08-29
1963	1963-06-05	1963-08-07
1964	1964-05-21	1964-08-01
1965	1965-05-25	1965-08-14
1966	1966-06-24	1966-07-25
1967	1967-07-21	1967-07-22
1968	1968-06-08	1968-08-23
1969	1969-05-27	1969-09-13
1970	1970-06-08	1970-08-15
1971	1971-06-06	1971-09-03
1972	1972-05-18	1972-08-30
1973	1973-07-07	1973-09-01
1974	1974-07-06	1974-07-18
1975	1975-05-22	1975-08-24
1976	1976-06-07	1976-09-09
1977	1977-05-13	1977-07-20
1978	1978-05-26	1978-09-07
1979	1979-06-15	1979-09-05
1980	1980-04-22	1980-08-08
1981	1981-07-06	1981-07-11
1982	1982-07-05	1982-07-17
1983	1983-06-22	1983-09-04
1984	1984-06-07	1984-08-29
1985	1985-07-13	1985-07-14
1986	1986-05-28	1986-08-16

Every Fixed Threshold

Fixed thresholds at Ishpeming
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	33	1983	14
35 C (95 F): Days	20	7	1936	1
90 F (32.2 C): Days	57	18	1931	7
100 F (37.8 C): Days	2	2	1936	2
0 C (32 F): Ice days (max	78	124	1926	83
0 C (32 F): Frost days (min	78	214	1926	183
-10 C (14 F): Days with min	78	103	1926	73
-20 C (-4 F): Days with min	78	44	1912	18
-30 C (-22 F): Days with min	39	10	1912	2
20 C (68 F): Tropical nights (min	59	10	1921	4
10 mm (0.39 in): Days with 10 mm or more rain	84	39	1903	17
25 mm (0.98 in): Days with 25 mm or more rain	82	14	1903	4
50 mm (1.97 in): Days with 50 mm or more rain	38	3	1949	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1949	1
10 cm (3.9 in): Days with 10 cm or more snowfall	63	17	1971	7
25 cm (9.8 in): Days with 25 cm or more snowfall	36	4	1971	1
50 cm (19.7 in): Days with 50 cm or more snowfall	5	1	1938	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Ishpeming 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).

Ishpeming Threshold Days by Year (USC00204127)

Key Facts for Ishpeming Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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