Hopkins Threshold Days by Year (SF003562850)

4 fixed thresholds counted per year at Hopkins (SF003562850): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hopkins Thresholds

Hopkins: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 1974 with 29.
Hopkins: days with 25 mm (0.98 in) or more of precipitation in 65 years, most in 1974 with 13.
Hopkins: days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1955 with 4.
Hopkins: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1920 with 1.
4 fixed thresholds have at least one qualifying day at Hopkins.

Days with 10 mm (0.39 in) or more of precipitation

72 years with a qualifying day

Days per year at Hopkins with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Hopkins
Year	Days	Decade average
1920	16	13.3
1921	15	13.3
1922	4	13.3
1923	13	13.3
1924	14	13.3
1925	18	13.3
1926	11	13.3
1927	9	13.3
1928	13	13.3
1929	20	13.3
1930	8	12.7
1931	14	12.7
1932	10	12.7
1933	5	12.7
1934	25	12.7
1938	15	12.7
1939	12	12.7
1941	13	10.2
1942	17	10.2
1943	15	10.2
1944	7	10.2
1945	3	10.2
1946	12	10.2
1947	12	10.2
1948	9	10.2
1949	4	10.2
1950	22	12.2
1951	9	12.2
1952	9	12.2
1954	4	12.2
1955	16	12.2
1956	8	12.2
1957	16	12.2
1958	13	12.2
1959	13	12.2
1960	8	9.5
1961	16	9.5
1962	11	9.5
1963	18	9.5
1964	3	9.5
1965	5	9.5
1966	8	9.5
1967	7	9.5
1968	7	9.5
1969	12	9.5
1970	7	15.6
1971	16	15.6
1972	11	15.6
1973	18	15.6
1974	29	15.6
1975	20	15.6
1976	21	15.6
1977	16	15.6
1978	10	15.6
1979	8	15.6
1980	10	10.8
1981	12	10.8
1982	11	10.8
1983	10	10.8
1985	9	10.8
1986	5	10.8
1987	10	10.8
1988	21	10.8
1989	9	10.8
1990	10	11.5
1991	20	11.5
1992	4	11.5
1993	11	11.5
1994	10	11.5
1995	17	11.5
1996	7	11.5
1997	13	11.5

For each year, a bar from the first to the last day at Hopkins meeting 10 mm (0.39 in).

First to last qualifying date each year at Hopkins
Year	First date	Last date
1920	1920-01-30	1920-12-15
1921	1921-02-03	1921-12-08
1922	1922-01-23	1922-12-18
1923	1923-01-06	1923-05-14
1924	1924-01-26	1924-12-10
1925	1925-02-15	1925-11-01
1926	1926-02-25	1926-12-23
1927	1927-03-14	1927-12-29
1928	1928-01-05	1928-12-26
1929	1929-01-18	1929-12-20
1930	1930-01-14	1930-11-16
1931	1931-01-17	1931-12-30
1932	1932-02-12	1932-12-05
1933	1933-04-02	1933-12-18
1934	1934-01-01	1934-12-25
1938	1938-01-21	1938-12-28
1939	1939-01-17	1939-11-11
1941	1941-01-07	1941-09-28
1942	1942-01-25	1942-12-22
1943	1943-01-04	1943-12-31
1944	1944-01-13	1944-10-22
1945	1945-01-06	1945-03-14
1946	1946-01-18	1946-12-29
1947	1947-01-12	1947-12-23
1948	1948-01-23	1948-04-18
1949	1949-01-29	1949-12-18
1950	1950-01-09	1950-12-25
1951	1951-01-01	1951-05-15
1952	1952-01-29	1952-12-14
1954	1954-03-05	1954-04-30
1955	1955-01-18	1955-12-17
1956	1956-01-14	1956-03-20
1957	1957-01-22	1957-12-30
1958	1958-01-11	1958-12-04
1959	1959-01-07	1959-12-12
1960	1960-02-22	1960-11-25
1961	1961-01-01	1961-11-26
1962	1962-01-17	1962-12-26
1963	1963-01-08	1963-12-08
1964	1964-03-05	1964-12-03
1965	1965-01-25	1965-11-10
1966	1966-01-22	1966-12-19
1967	1967-01-30	1967-11-16
1968	1968-01-31	1968-12-01
1969	1969-02-23	1969-12-18
1970	1970-01-20	1970-12-24
1971	1971-01-05	1971-12-01
1972	1972-01-08	1972-11-02
1973	1973-02-14	1973-12-21
1974	1974-01-05	1974-11-11
1975	1975-01-29	1975-12-18
1976	1976-01-02	1976-04-14
1977	1977-01-27	1977-12-24
1978	1978-01-03	1978-12-12
1979	1979-01-17	1979-12-23
1980	1980-02-17	1980-12-25
1981	1981-01-23	1981-12-11
1982	1982-02-07	1982-12-05
1983	1983-01-15	1983-12-28
1985	1985-01-22	1985-12-04
1986	1986-01-23	1986-11-20
1987	1987-02-11	1987-12-22
1988	1988-01-11	1988-12-31
1989	1989-01-01	1989-05-31
1990	1990-01-15	1990-12-10
1991	1991-01-15	1991-12-17
1992	1992-03-17	1992-12-10
1993	1993-02-07	1993-11-21
1994	1994-01-10	1994-11-30
1995	1995-01-13	1995-12-17
1996	1996-01-04	1996-12-28
1997	1997-01-05	1997-10-29

Every Fixed Threshold

Fixed thresholds at Hopkins
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	72	29	1974	13
25 mm (0.98 in): Days with 25 mm or more rain	65	13	1974	5
50 mm (1.97 in): Days with 50 mm or more rain	26	4	1955	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1920	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for Hopkins 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).

Hopkins Threshold Days by Year (SF003562850)

Key Facts for Hopkins Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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