Rockford Threshold Days by Year (SF001007790)

4 fixed thresholds counted per year at Rockford (SF001007790): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rockford Thresholds

Rockford: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1974 with 43.
Rockford: days with 25 mm (0.98 in) or more of precipitation in 64 years, most in 1979 with 12.
Rockford: days with 50 mm (1.97 in) or more of precipitation in 35 years, most in 1970 with 4.
Rockford: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1970 with 2.
4 fixed thresholds have at least one qualifying day at Rockford.

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

67 years with a qualifying day

Days per year at Rockford with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Rockford
Year	Days	Decade average
1914	11	20.2
1915	19	20.2
1916	17	20.2
1917	31	20.2
1918	26	20.2
1919	17	20.2
1920	20	17.5
1922	19	17.5
1923	24	17.5
1925	25	17.5
1926	13	17.5
1927	6	17.5
1928	14	17.5
1929	19	17.5
1930	27	23.9
1931	33	23.9
1932	19	23.9
1933	20	23.9
1934	23	23.9
1935	24	23.9
1936	21	23.9
1943	29	17.7
1944	22	17.7
1945	16	17.7
1946	17	17.7
1947	19	17.7
1948	13	17.7
1949	8	17.7
1950	24	20.5
1951	11	20.5
1952	26	20.5
1953	20	20.5
1954	22	20.5
1955	21	20.5
1956	21	20.5
1957	15	20.5
1958	23	20.5
1959	22	20.5
1960	25	20.5
1961	20	20.5
1962	24	20.5
1963	23	20.5
1964	20	20.5
1965	23	20.5
1966	15	20.5
1967	17	20.5
1968	19	20.5
1969	19	20.5
1970	17	24.9
1971	18	24.9
1972	24	24.9
1973	22	24.9
1974	43	24.9
1975	17	24.9
1976	34	24.9
1977	23	24.9
1978	23	24.9
1979	28	24.9
1980	19	20.4
1981	27	20.4
1982	18	20.4
1983	18	20.4
1984	16	20.4
1985	26	20.4
1986	25	20.4
1987	16	20.4
1988	19	20.4

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

First to last qualifying date each year at Rockford
Year	First date	Last date
1914	1914-04-02	1914-11-27
1915	1915-01-03	1915-12-30
1916	1916-01-05	1916-12-27
1917	1917-01-14	1917-12-25
1918	1918-01-01	1918-12-30
1919	1919-02-17	1919-11-23
1920	1920-01-28	1920-12-30
1922	1922-02-01	1922-12-18
1923	1923-01-07	1923-11-13
1925	1925-02-11	1925-12-06
1926	1926-01-25	1926-12-27
1927	1927-03-16	1927-12-28
1928	1928-01-04	1928-12-22
1929	1929-01-15	1929-12-29
1930	1930-01-03	1930-12-30
1931	1931-01-03	1931-12-31
1932	1932-01-01	1932-12-25
1933	1933-02-11	1933-12-30
1934	1934-01-08	1934-12-24
1935	1935-01-04	1935-12-27
1936	1936-01-08	1936-12-09
1943	1943-01-12	1943-12-31
1944	1944-01-08	1944-10-22
1945	1945-01-05	1945-12-04
1946	1946-01-08	1946-12-19
1947	1947-02-01	1947-12-28
1948	1948-01-08	1948-12-21
1949	1949-02-28	1949-12-11
1950	1950-01-05	1950-12-29
1951	1951-01-10	1951-12-11
1952	1952-01-31	1952-12-17
1953	1953-01-06	1953-12-20
1954	1954-01-16	1954-12-09
1955	1955-01-06	1955-12-28
1956	1956-01-18	1956-12-17
1957	1957-01-07	1957-12-29
1958	1958-01-02	1958-12-20
1959	1959-01-24	1959-12-22
1960	1960-01-04	1960-12-19
1961	1961-01-12	1961-12-14
1962	1962-01-19	1962-12-28
1963	1963-01-04	1963-12-12
1964	1964-01-01	1964-12-26
1965	1965-01-01	1965-12-17
1966	1966-01-31	1966-11-10
1967	1967-01-13	1967-12-10
1968	1968-02-11	1968-12-23
1969	1969-01-08	1969-11-09
1970	1970-01-18	1970-12-24
1971	1971-01-09	1971-11-14
1972	1972-01-07	1972-12-16
1973	1973-02-03	1973-12-23
1974	1974-01-07	1974-12-17
1975	1975-02-04	1975-12-22
1976	1976-01-09	1976-12-26
1977	1977-01-02	1977-12-31
1978	1978-01-03	1978-12-22
1979	1979-01-01	1979-12-24
1980	1980-01-21	1980-12-26
1981	1981-01-24	1981-12-23
1982	1982-01-11	1982-11-16
1983	1983-01-26	1983-12-21
1984	1984-01-01	1984-12-24
1985	1985-01-04	1985-12-24
1986	1986-01-03	1986-12-16
1987	1987-01-15	1987-12-06
1988	1988-02-18	1988-12-24

Every Fixed Threshold

Fixed thresholds at Rockford
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	67	43	1974	19
25 mm (0.98 in): Days with 25 mm or more rain	64	12	1979	6
50 mm (1.97 in): Days with 50 mm or more rain	35	4	1970	1
100 mm (3.94 in): Days with 100 mm or more rain	3	2	1970	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

Data for Rockford 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).

Rockford Threshold Days by Year (SF001007790)

Key Facts for Rockford Thresholds

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

Every Fixed Threshold

Download the Data

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