Bladensburg Threshold Days by Year

4 fixed thresholds counted per year at Bladensburg (ASN00037006): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bladensburg Thresholds

Bladensburg: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1974 with 26.
Bladensburg: days with 25 mm (0.98 in) or more of precipitation in 74 years, most in 1930 with 11.
Bladensburg: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1920 with 5.
Bladensburg: days with 100 mm (3.94 in) or more of precipitation in 10 years, most in 1973 with 2.
4 fixed thresholds have at least one qualifying day at Bladensburg.

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

78 years with a qualifying day

Days per year at Bladensburg with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Bladensburg
Year	Days	Decade average
1917	16	13.7
1918	16	13.7
1919	9	13.7
1920	24	11.7
1921	12	11.7
1922	9	11.7
1923	6	11.7
1924	17	11.7
1925	10	11.7
1926	4	11.7
1930	18	9.1
1931	8	9.1
1932	6	9.1
1933	7	9.1
1934	8	9.1
1935	5	9.1
1937	11	9.1
1938	5	9.1
1939	14	9.1
1940	11	13.3
1941	21	13.3
1942	8	13.3
1951	3	9.3
1952	9	9.3
1953	10	9.3
1954	13	9.3
1955	15	9.3
1959	6	9.3
1960	8	7.3
1961	7	7.3
1962	14	7.3
1963	7	7.3
1964	9	7.3
1965	6	7.3
1966	6	7.3
1967	4	7.3
1968	9	7.3
1969	3	7.3
1970	7	16.8
1971	21	16.8
1972	7	16.8
1973	23	16.8
1974	26	16.8
1975	20	16.8
1976	19	16.8
1977	19	16.8
1978	13	16.8
1979	13	16.8
1980	10	11.6
1981	13	11.6
1982	9	11.6
1983	5	11.6
1984	16	11.6
1985	13	11.6
1986	10	11.6
1987	11	11.6
1988	10	11.6
1989	19	11.6
1993	10	12.1
1994	9	12.1
1995	10	12.1
1996	12	12.1
1997	11	12.1
1998	22	12.1
1999	11	12.1
2000	22	12.6
2001	9	12.6
2002	3	12.6
2003	14	12.6
2004	15	12.6
2018	9	9.5
2019	10	9.5
2020	4	10.2
2021	11	10.2
2022	21	10.2
2023	11	10.2
2024	12	10.2
2025	2	10.2

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

First to last qualifying date each year at Bladensburg
Year	First date	Last date
1917	1917-01-22	1917-12-13
1918	1918-01-01	1918-12-01
1919	1919-01-11	1919-12-06
1920	1920-01-19	1920-12-07
1921	1921-03-05	1921-12-26
1922	1922-01-30	1922-12-26
1923	1923-01-07	1923-12-21
1924	1924-01-06	1924-12-13
1925	1925-01-01	1925-11-18
1926	1926-05-10	1926-12-18
1930	1930-01-15	1930-11-26
1931	1931-03-15	1931-12-04
1932	1932-02-10	1932-11-01
1933	1933-02-13	1933-12-03
1934	1934-01-28	1934-10-15
1935	1935-01-20	1935-09-11
1937	1937-01-02	1937-11-12
1938	1938-01-24	1938-07-24
1939	1939-02-14	1939-12-22
1940	1940-01-08	1940-11-12
1941	1941-01-01	1941-12-30
1942	1942-02-17	1942-12-28
1951	1951-03-03	1951-08-20
1952	1952-02-22	1952-11-26
1953	1953-01-07	1953-12-30
1954	1954-01-15	1954-12-09
1955	1955-01-21	1955-12-20
1959	1959-01-26	1959-12-19
1960	1960-02-11	1960-12-26
1961	1961-01-03	1961-12-24
1962	1962-01-12	1962-12-28
1963	1963-02-01	1963-04-05
1964	1964-01-01	1964-12-25
1965	1965-03-09	1965-12-21
1966	1966-01-07	1966-11-08
1967	1967-03-07	1967-12-30
1968	1968-02-12	1968-05-24
1969	1969-03-18	1969-12-23
1970	1970-02-01	1970-12-19
1971	1971-01-16	1971-12-26
1972	1972-01-10	1972-10-27
1973	1973-01-27	1973-12-26
1974	1974-01-01	1974-12-27
1975	1975-01-01	1975-12-19
1976	1976-01-13	1976-12-22
1977	1977-01-17	1977-12-20
1978	1978-01-17	1978-12-10
1979	1979-01-22	1979-12-30
1980	1980-01-04	1980-12-02
1981	1981-01-14	1981-07-21
1982	1982-01-02	1982-11-19
1983	1983-03-03	1983-05-20
1984	1984-01-11	1984-12-18
1985	1985-02-05	1985-12-22
1986	1986-02-03	1986-12-07
1987	1987-01-10	1987-12-29
1988	1988-02-11	1988-12-28
1989	1989-01-04	1989-12-14
1993	1993-01-14	1993-12-22
1994	1994-02-01	1994-12-23
1995	1995-01-18	1995-12-23
1996	1996-01-04	1996-12-19
1997	1997-01-29	1997-12-25
1998	1998-01-12	1998-12-31
1999	1999-01-01	1999-12-18
2000	2000-02-15	2000-12-29
2001	2001-01-29	2001-12-16
2002	2002-01-05	2002-12-29
2003	2003-02-23	2003-12-27
2004	2004-01-08	2004-12-25
2018	2018-01-28	2018-12-14
2019	2019-01-30	2019-03-29
2020	2020-01-30	2020-03-05
2021	2021-01-04	2021-11-11
2022	2022-01-25	2022-12-27
2023	2023-01-11	2023-11-23
2024	2024-01-09	2024-11-29
2025	2025-01-02	2025-03-09

Every Fixed Threshold

Fixed thresholds at Bladensburg
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	78	26	1974	2
25 mm (0.98 in): Days with 25 mm or more rain	74	11	1930	4
50 mm (1.97 in): Days with 50 mm or more rain	52	5	1920	2
100 mm (3.94 in): Days with 100 mm or more rain	10	2	1973	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

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Data for Bladensburg 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).

Bladensburg Threshold Days by Year

Key Facts for Bladensburg Thresholds

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

Every Fixed Threshold

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