Alexandria (Bos) Threshold Days by Year (SF000366420)

5 fixed thresholds counted per year at Alexandria (Bos) (SF000366420): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alexandria (Bos) Thresholds

Alexandria (Bos): days with 10 mm (0.39 in) or more of precipitation in 75 years, most in 1932 with 46.
Alexandria (Bos): days with 25 mm (0.98 in) or more of precipitation in 75 years, most in 1922 with 17.
Alexandria (Bos): days with 50 mm (1.97 in) or more of precipitation in 64 years, most in 1931 with 7.
Alexandria (Bos): days with 100 mm (3.94 in) or more of precipitation in 26 years, most in 1932 with 2.
5 fixed thresholds have at least one qualifying day at Alexandria (Bos).

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

75 years with a qualifying day

Days per year at Alexandria (Bos) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 46 in 1932.

Days with 10 mm (0.39 in) or more of precipitation per year at Alexandria (Bos)
Year	Days	Decade average
1921	31	29.2
1922	33	29.2
1923	33	29.2
1924	22	29.2
1925	37	29.2
1926	31	29.2
1927	17	29.2
1928	36	29.2
1929	23	29.2
1930	31	31.2
1931	30	31.2
1932	46	31.2
1933	26	31.2
1934	30	31.2
1935	36	31.2
1936	33	31.2
1937	20	31.2
1938	27	31.2
1939	33	31.2
1940	31	27.2
1941	24	27.2
1942	29	27.2
1943	26	27.2
1944	34	27.2
1945	22	27.2
1946	27	27.2
1947	35	27.2
1948	27	27.2
1949	17	27.2
1950	26	27.1
1951	32	27.1
1952	29	27.1
1953	25	27.1
1954	27	27.1
1955	27	27.1
1956	25	27.1
1957	19	27.1
1958	28	27.1
1959	33	27.1
1960	24	25.3
1961	26	25.3
1962	20	25.3
1963	27	25.3
1964	23	25.3
1965	30	25.3
1966	23	25.3
1967	26	25.3
1968	28	25.3
1969	26	25.3
1970	29	29.7
1971	29	29.7
1972	25	29.7
1973	25	29.7
1974	39	29.7
1975	27	29.7
1976	31	29.7
1978	32	29.7
1979	30	29.7
1980	19	23
1981	28	23
1982	24	23
1983	21	23
1984	19	23
1985	25	23
1986	30	23
1987	14	23
1988	20	23
1989	30	23
1990	30	25.3
1991	17	25.3
1992	17	25.3
1993	24	25.3
1994	38	25.3
1995	26	25.3
1996	25	25.3

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

First to last qualifying date each year at Alexandria (Bos)
Year	First date	Last date
1921	1921-01-04	1921-12-29
1922	1922-01-08	1922-12-20
1923	1923-01-10	1923-12-01
1924	1924-01-10	1924-12-04
1925	1925-01-20	1925-12-29
1926	1926-01-30	1926-12-27
1927	1927-01-05	1927-12-20
1928	1928-01-04	1928-12-30
1929	1929-04-15	1929-12-28
1930	1930-01-08	1930-11-29
1931	1931-01-03	1931-12-31
1932	1932-01-01	1932-12-18
1933	1933-02-18	1933-11-27
1934	1934-01-12	1934-12-17
1935	1935-01-03	1935-12-27
1936	1936-01-16	1936-12-04
1937	1937-01-19	1937-12-20
1938	1938-01-21	1938-11-15
1939	1939-01-29	1939-12-04
1940	1940-01-20	1940-11-23
1941	1941-01-08	1941-12-31
1942	1942-01-27	1942-12-02
1943	1943-01-22	1943-12-13
1944	1944-01-05	1944-12-31
1945	1945-01-31	1945-12-31
1946	1946-01-05	1946-12-31
1947	1947-01-01	1947-12-03
1948	1948-01-07	1948-12-20
1949	1949-02-05	1949-11-17
1950	1950-04-05	1950-12-29
1951	1951-01-03	1951-12-11
1952	1952-01-31	1952-12-18
1953	1953-01-12	1953-12-20
1954	1954-03-13	1954-12-15
1955	1955-01-13	1955-12-19
1956	1956-01-26	1956-12-20
1957	1957-02-12	1957-12-30
1958	1958-01-16	1958-12-23
1959	1959-01-01	1959-12-30
1960	1960-01-04	1960-12-17
1961	1961-01-20	1961-12-26
1962	1962-01-19	1962-12-29
1963	1963-01-04	1963-12-11
1964	1964-01-01	1964-12-26
1965	1965-01-03	1965-12-17
1966	1966-01-06	1966-11-04
1967	1967-01-30	1967-11-16
1968	1968-01-04	1968-12-12
1969	1969-01-06	1969-12-31
1970	1970-01-12	1970-12-06
1971	1971-01-26	1971-12-20
1972	1972-01-09	1972-12-13
1973	1973-01-22	1973-12-06
1974	1974-02-07	1974-12-17
1975	1975-01-02	1975-12-22
1976	1976-01-09	1976-12-31
1978	1978-01-26	1978-12-23
1979	1979-01-01	1979-12-24
1980	1980-01-05	1980-12-02
1981	1981-01-23	1981-12-24
1982	1982-02-16	1982-12-22
1983	1983-01-18	1983-12-29
1984	1984-02-07	1984-12-24
1985	1985-01-14	1985-12-20
1986	1986-01-03	1986-12-30
1987	1987-02-10	1987-09-26
1988	1988-01-06	1988-12-10
1989	1989-02-17	1989-12-07
1990	1990-01-06	1990-11-05
1991	1991-01-07	1991-12-19
1992	1992-01-18	1992-11-12
1993	1993-01-10	1993-12-29
1994	1994-01-09	1994-12-28
1995	1995-01-07	1995-12-25
1996	1996-01-20	1996-12-26

Every Fixed Threshold

Fixed thresholds at Alexandria (Bos)
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	75	46	1932	25
25 mm (0.98 in): Days with 25 mm or more rain	75	17	1922	9
50 mm (1.97 in): Days with 50 mm or more rain	64	7	1931	2
100 mm (3.94 in): Days with 100 mm or more rain	26	2	1932	1
200 mm (7.87 in): Days with 200 mm or more rain	3	2	1989	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.

Download the Data

Data for Alexandria (Bos) 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).

Alexandria (Bos) Threshold Days by Year (SF000366420)

Key Facts for Alexandria (Bos) Thresholds

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

Every Fixed Threshold

Download the Data

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