Blair Threshold Days by Year

6 fixed thresholds counted per year at Blair (USC00380772): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blair Thresholds

Blair: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1948 with 53.
Blair: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1929 with 23.
Blair: days with 50 mm (1.97 in) or more of precipitation in 65 years, most in 1964 with 11.
Blair: days with 100 mm (3.94 in) or more of precipitation in 16 years, most in 1959 with 2.
6 fixed thresholds have at least one qualifying day at Blair.

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

68 years with a qualifying day

Days per year at Blair with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 53 in 1948.

Days with 10 mm (0.39 in) or more of precipitation per year at Blair
Year	Days	Decade average
1906	41	39.5
1907	41	39.5
1908	42	39.5
1909	34	39.5
1910	38	34.5
1911	29	34.5
1912	36	34.5
1913	36	34.5
1914	36	34.5
1915	35	34.5
1916	31	34.5
1917	33	34.5
1918	35	34.5
1919	36	34.5
1920	45	37.7
1921	35	37.7
1923	40	37.7
1925	27	37.7
1926	28	37.7
1927	37	37.7
1929	52	37.7
1930	40	36.4
1931	29	36.4
1932	38	36.4
1933	28	36.4
1934	38	36.4
1935	31	36.4
1936	46	36.4
1937	40	36.4
1939	38	36.4
1940	34	38.3
1941	35	38.3
1945	39	38.3
1946	33	38.3
1948	53	38.3
1949	36	38.3
1950	36	35.8
1951	35	35.8
1952	37	35.8
1953	35	35.8
1954	25	35.8
1955	33	35.8
1956	33	35.8
1957	43	35.8
1958	38	35.8
1959	43	35.8
1960	46	40.6
1961	42	40.6
1962	35	40.6
1963	45	40.6
1964	42	40.6
1965	42	40.6
1966	36	40.6
1967	37	40.6
1968	40	40.6
1969	41	40.6
1970	35	41.2
1971	50	41.2
1972	47	41.2
1973	38	41.2
1974	36	41.2
1975	48	41.2
1976	43	41.2
1977	37	41.2
1978	38	41.2
1979	40	41.2
1980	38	36.5
1981	35	36.5

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

First to last qualifying date each year at Blair
Year	First date	Last date
1906	1906-01-03	1906-12-31
1907	1907-02-02	1907-12-31
1908	1908-01-05	1908-12-23
1909	1909-01-17	1909-12-25
1910	1910-01-21	1910-12-23
1911	1911-01-03	1911-12-23
1912	1912-01-01	1912-12-24
1913	1913-01-24	1913-12-30
1914	1914-01-03	1914-12-30
1915	1915-01-06	1915-12-29
1916	1916-01-13	1916-12-19
1917	1917-01-25	1917-12-12
1918	1918-01-12	1918-12-22
1919	1919-01-03	1919-12-14
1920	1920-01-17	1920-12-27
1921	1921-01-10	1921-12-18
1923	1923-01-01	1923-12-23
1925	1925-01-01	1925-12-22
1926	1926-01-04	1926-12-29
1927	1927-01-27	1927-12-16
1929	1929-01-06	1929-12-23
1930	1930-01-03	1930-12-27
1931	1931-01-05	1931-12-25
1932	1932-01-01	1932-12-29
1933	1933-01-09	1933-12-20
1934	1934-01-08	1934-12-19
1935	1935-01-01	1935-12-31
1936	1936-01-02	1936-12-31
1937	1937-01-01	1937-12-28
1939	1939-01-13	1939-12-27
1940	1940-01-12	1940-12-26
1941	1941-01-03	1941-12-26
1945	1945-01-01	1945-12-31
1946	1946-01-07	1946-11-18
1948	1948-01-02	1948-12-30
1949	1949-01-06	1949-12-15
1950	1950-01-11	1950-12-31
1951	1951-01-15	1951-12-26
1952	1952-01-28	1952-12-31
1953	1953-01-09	1953-12-14
1954	1954-01-12	1954-12-14
1955	1955-01-01	1955-11-26
1956	1956-01-19	1956-12-24
1957	1957-01-05	1957-12-21
1958	1958-01-07	1958-12-29
1959	1959-01-01	1959-12-18
1960	1960-01-03	1960-12-21
1961	1961-01-01	1961-12-18
1962	1962-01-02	1962-12-30
1963	1963-01-12	1963-12-24
1964	1964-01-01	1964-12-27
1965	1965-01-17	1965-11-22
1966	1966-01-06	1966-12-29
1967	1967-01-09	1967-12-29
1968	1968-01-04	1968-12-28
1969	1969-01-01	1969-12-26
1970	1970-01-06	1970-12-17
1971	1971-01-05	1971-12-04
1972	1972-01-10	1972-12-22
1973	1973-01-04	1973-12-31
1974	1974-01-01	1974-12-28
1975	1975-01-09	1975-12-31
1976	1976-01-01	1976-12-26
1977	1977-01-07	1977-12-31
1978	1978-01-09	1978-12-25
1979	1979-01-13	1979-12-25
1980	1980-01-09	1980-12-10
1981	1981-02-11	1981-12-25

Every Fixed Threshold

Fixed thresholds at Blair
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	68	53	1948	35
25 mm (0.98 in): Days with 25 mm or more rain	68	23	1929	12
50 mm (1.97 in): Days with 50 mm or more rain	65	11	1964	4
100 mm (3.94 in): Days with 100 mm or more rain	16	2	1959	1
10 cm (3.9 in): Days with 10 cm or more snowfall	10	2	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1969	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

Data for Blair 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).

Blair Threshold Days by Year

Key Facts for Blair Thresholds

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

Every Fixed Threshold

Download the Data

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