Blair Threshold Days by Year (USC00470882)

20 fixed thresholds counted per year at Blair (USC00470882): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blair Thresholds

Blair: days with a maximum temperature at or above 30 C (86 F) in 80 years, most in 1933 with 66.
Blair: days with a maximum temperature at or below 0 C (32 F) in 80 years, most in 1978 with 96.
Blair: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 2002 with 205.
Blair: nights with a minimum temperature at or below -10 C (14 F) in 80 years, most in 1989 with 102.
20 fixed thresholds have at least one qualifying day at Blair.

Days at or above 30 C (86 F)

80 years with a qualifying day

Days per year at Blair with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 66 in 1933.

Days at or above 30 C (86 F) per year at Blair
Year	Days	Decade average
1929	27	27
1930	54	47.9
1931	45	47.9
1932	47	47.9
1933	66	47.9
1934	48	47.9
1935	35	47.9
1936	57	47.9
1937	52	47.9
1938	23	47.9
1939	52	47.9
1940	33	37.4
1941	48	37.4
1942	13	37.4
1943	36	37.4
1944	40	37.4
1945	29	37.4
1946	23	37.4
1947	44	37.4
1948	56	37.4
1949	52	37.4
1950	17	31
1951	12	31
1952	37	31
1953	35	31
1954	28	31
1955	52	31
1956	29	31
1957	34	31
1958	22	31
1959	44	31
1960	27	28.4
1961	36	28.4
1962	22	28.4
1963	36	28.4
1964	45	28.4
1965	21	28.4
1966	37	28.4
1967	15	28.4
1968	21	28.4
1969	24	28.4
1970	35	27.2
1971	26	27.2
1972	32	27.2
1973	19	27.2
1974	20	27.2
1975	37	27.2
1976	40	27.2
1977	27	27.2
1978	25	27.2
1979	11	27.2
1980	35	25.4
1981	12	25.4
1982	14	25.4
1983	40	25.4
1984	16	25.4
1985	17	25.4
1986	14	25.4
1987	33	25.4
1988	51	25.4
1989	22	25.4
1990	11	20.8
1991	29	20.8
1992	9	20.8
1993	9	20.8
1994	17	20.8
1995	41	20.8
1996	17	20.8
1997	19	20.8
1998	26	20.8
1999	30	20.8
2000	18	25.9
2001	45	25.9
2002	45	25.9
2003	26	25.9
2004	5	25.9
2005	29	25.9
2006	26	25.9
2007	30	25.9
2008	9	25.9

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

First to last qualifying date each year at Blair
Year	First date	Last date
1929	1929-06-01	1929-09-04
1930	1930-05-06	1930-09-24
1931	1931-05-28	1931-09-21
1932	1932-05-15	1932-09-12
1933	1933-06-02	1933-09-09
1934	1934-05-06	1934-08-18
1935	1935-06-24	1935-09-25
1936	1936-05-07	1936-09-23
1937	1937-05-29	1937-09-24
1938	1938-06-12	1938-09-05
1939	1939-04-25	1939-09-16
1940	1940-05-14	1940-09-21
1941	1941-05-27	1941-09-22
1942	1942-06-06	1942-08-31
1943	1943-05-06	1943-09-01
1944	1944-05-28	1944-09-22
1945	1945-06-21	1945-09-08
1946	1946-06-07	1946-08-17
1947	1947-06-09	1947-10-14
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-08-26
1950	1950-05-23	1950-10-18
1951	1951-06-17	1951-08-29
1952	1952-04-28	1952-09-13
1953	1953-05-29	1953-10-16
1954	1954-06-09	1954-09-06
1955	1955-05-02	1955-09-18
1956	1956-05-12	1956-08-28
1957	1957-05-01	1957-09-02
1958	1958-05-10	1958-08-28
1959	1959-05-02	1959-09-09
1960	1960-04-22	1960-09-08
1961	1961-05-12	1961-09-11
1962	1962-04-26	1962-08-29
1963	1963-06-02	1963-10-06
1964	1964-04-16	1964-08-27
1965	1965-05-02	1965-08-18
1966	1966-05-26	1966-09-01
1967	1967-05-18	1967-08-17
1968	1968-06-04	1968-08-24
1969	1969-05-27	1969-08-31
1970	1970-04-29	1970-09-07
1971	1971-06-04	1971-09-08
1972	1972-05-17	1972-08-30
1973	1973-06-10	1973-09-02
1974	1974-05-22	1974-08-21
1975	1975-05-20	1975-08-29
1976	1976-06-07	1976-10-02
1977	1977-04-28	1977-08-28
1978	1978-05-27	1978-09-12
1979	1979-06-16	1979-09-06
1980	1980-04-22	1980-09-09
1981	1981-06-06	1981-09-11
1982	1982-06-29	1982-08-19
1983	1983-06-22	1983-09-10
1984	1984-06-27	1984-09-08
1985	1985-04-19	1985-09-20
1986	1986-06-01	1986-08-17
1987	1987-04-21	1987-08-16
1988	1988-05-29	1988-09-03
1989	1989-06-20	1989-08-23
1990	1990-06-26	1990-09-07
1991	1991-04-07	1991-08-31
1992	1992-05-02	1992-08-25
1993	1993-06-23	1993-08-27
1994	1994-05-23	1994-09-16
1995	1995-06-15	1995-09-07
1996	1996-05-19	1996-09-08
1997	1997-06-23	1997-10-04
1998	1998-05-15	1998-09-20
1999	1999-05-29	1999-09-05
2000	2000-05-05	2000-09-19
2001	2001-05-15	2001-08-26
2002	2002-04-16	2002-09-10
2003	2003-04-15	2003-09-12
2004	2004-06-08	2004-08-27
2005	2005-06-11	2005-09-22
2006	2006-05-29	2006-08-05
2007	2007-04-30	2007-10-07
2008	2008-07-16	2008-09-03

Every Fixed Threshold

Fixed thresholds at Blair
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	80	66	1933	9
35 C (95 F): Days	49	20	1964	1
40 C (104 F): Days	5	4	1936	1
90 F (32.2 C): Days	78	38	1930	1
100 F (37.8 C): Days	13	11	1936	2
0 C (32 F): Ice days (max	80	96	1978	82
0 C (32 F): Frost days (min	80	205	2002	169
-10 C (14 F): Days with min	80	102	1989	90
-20 C (-4 F): Days with min	80	60	1978	49
-30 C (-22 F): Days with min	60	21	1936	6
-40 C (-40 F): Days with min	9	3	1936	3
20 C (68 F): Tropical nights (min	79	17	1949	4
25 C (77 F): Days with min	8	4	1937	1
10 mm (0.39 in): Days with 10 mm or more rain	76	39	1968	18
25 mm (0.98 in): Days with 25 mm or more rain	75	13	1972	5
50 mm (1.97 in): Days with 50 mm or more rain	52	4	1954	3
100 mm (3.94 in): Days with 100 mm or more rain	7	2	1954	1
10 cm (3.9 in): Days with 10 cm or more snowfall	66	10	1929	5
25 cm (9.8 in): Days with 25 cm or more snowfall	14	3	1929	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	0	n/a	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1929.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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

Blair Threshold Days by Year (USC00470882)

Key Facts for Blair Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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