Three Rivers Threshold Days by Year

5 fixed thresholds counted per year at Three Rivers (USC00419009): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Three Rivers Thresholds

Three Rivers: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1941 with 31.
Three Rivers: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1960 with 15.
Three Rivers: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1923 with 6.
Three Rivers: days with 100 mm (3.94 in) or more of precipitation in 13 years, most in 1935 with 3.
5 fixed thresholds have at least one qualifying day at Three Rivers.

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

63 years with a qualifying day

Days per year at Three Rivers with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1941.

Days with 10 mm (0.39 in) or more of precipitation per year at Three Rivers
Year	Days	Decade average
1923	26	19.4
1924	17	19.4
1925	11	19.4
1926	23	19.4
1927	20	19.4
1928	21	19.4
1929	18	19.4
1930	24	18.9
1931	22	18.9
1932	20	18.9
1933	21	18.9
1934	18	18.9
1935	29	18.9
1936	21	18.9
1937	13	18.9
1938	8	18.9
1939	13	18.9
1940	27	21.9
1941	31	21.9
1942	20	21.9
1943	11	21.9
1944	24	21.9
1945	17	21.9
1946	26	21.9
1947	22	21.9
1948	15	21.9
1949	26	21.9
1950	11	14.6
1951	19	14.6
1952	15	14.6
1953	12	14.6
1954	8	14.6
1955	12	14.6
1956	8	14.6
1957	22	14.6
1958	26	14.6
1959	13	14.6
1960	26	19.4
1961	13	19.4
1962	13	19.4
1963	21	19.4
1964	18	19.4
1965	22	19.4
1966	19	19.4
1967	23	19.4
1968	21	19.4
1969	18	19.4
1970	24	19.4
1971	21	19.4
1974	18	19.4
1975	11	19.4
1976	30	19.4
1977	13	19.4
1978	18	19.4
1979	20	19.4
1980	15	19.8
1981	23	19.8
1982	15	19.8
1983	21	19.8
1984	17	19.8
1985	28	19.8
1986	18	19.8
1987	21	19.8

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

First to last qualifying date each year at Three Rivers
Year	First date	Last date
1923	1923-02-04	1923-12-21
1924	1924-01-29	1924-12-28
1925	1925-03-22	1925-12-16
1926	1926-01-02	1926-12-19
1927	1927-02-04	1927-12-27
1928	1928-01-21	1928-12-19
1929	1929-01-04	1929-12-20
1930	1930-02-03	1930-12-21
1931	1931-01-10	1931-12-08
1932	1932-01-03	1932-12-24
1933	1933-01-09	1933-11-06
1934	1934-01-06	1934-12-27
1935	1935-02-07	1935-12-31
1936	1936-03-03	1936-11-11
1937	1937-05-14	1937-12-30
1938	1938-01-23	1938-12-26
1939	1939-01-26	1939-12-26
1940	1940-02-16	1940-12-27
1941	1941-01-28	1941-12-10
1942	1942-01-07	1942-10-05
1943	1943-03-25	1943-12-04
1944	1944-01-01	1944-12-05
1945	1945-02-05	1945-10-10
1946	1946-01-05	1946-10-16
1947	1947-01-01	1947-12-15
1948	1948-01-19	1948-11-14
1949	1949-01-21	1949-12-15
1950	1950-02-21	1950-10-03
1951	1951-02-13	1951-11-27
1952	1952-02-23	1952-12-28
1953	1953-02-24	1953-10-26
1954	1954-04-28	1954-11-10
1955	1955-02-06	1955-12-01
1956	1956-05-03	1956-12-19
1957	1957-02-13	1957-12-31
1958	1958-01-04	1958-12-31
1959	1959-02-02	1959-12-31
1960	1960-01-14	1960-12-31
1961	1961-01-26	1961-10-26
1962	1962-03-14	1962-12-23
1963	1963-02-12	1963-12-22
1964	1964-01-30	1964-12-10
1965	1965-01-22	1965-12-18
1966	1966-01-22	1966-09-09
1967	1967-02-06	1967-10-16
1968	1968-01-09	1968-12-01
1969	1969-02-14	1969-12-30
1970	1970-01-05	1970-10-19
1971	1971-04-17	1971-12-06
1974	1974-01-26	1974-12-27
1975	1975-03-13	1975-12-24
1976	1976-04-05	1976-12-20
1977	1977-01-13	1977-11-02
1978	1978-03-07	1978-12-30
1979	1979-01-11	1979-09-20
1980	1980-01-21	1980-12-15
1981	1981-01-19	1981-10-24
1982	1982-02-25	1982-11-27
1983	1983-02-15	1983-12-17
1984	1984-01-09	1984-12-31
1985	1985-01-16	1985-12-12
1986	1986-01-08	1986-12-22
1987	1987-01-16	1987-12-21

Every Fixed Threshold

Fixed thresholds at Three Rivers
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	63	31	1941	21
25 mm (0.98 in): Days with 25 mm or more rain	63	15	1960	8
50 mm (1.97 in): Days with 50 mm or more rain	51	6	1923	3
100 mm (3.94 in): Days with 100 mm or more rain	13	3	1935	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1967	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1923.

Download the Data

Data for Three Rivers 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Three Rivers Threshold Days by Year

Key Facts for Three Rivers Thresholds

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

Every Fixed Threshold

Download the Data

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