Mbulu (Bos) Threshold Days by Year

4 fixed thresholds counted per year at Mbulu (Bos) (SF001023690): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mbulu (Bos) Thresholds

Mbulu (Bos): days with 10 mm (0.39 in) or more of precipitation in 71 years, most in 1963 with 50.
Mbulu (Bos): days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1932 with 19.
Mbulu (Bos): days with 50 mm (1.97 in) or more of precipitation in 46 years, most in 1932 with 15.
Mbulu (Bos): days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1932 with 4.
4 fixed thresholds have at least one qualifying day at Mbulu (Bos).

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

71 years with a qualifying day

Days per year at Mbulu (Bos) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 50 in 1963.

Days with 10 mm (0.39 in) or more of precipitation per year at Mbulu (Bos)
Year	Days	Decade average
1922	29	25.9
1923	33	25.9
1924	20	25.9
1925	29	25.9
1926	25	25.9
1927	19	25.9
1928	26	25.9
1930	33	29.7
1931	28	29.7
1932	26	29.7
1933	27	29.7
1934	26	29.7
1935	24	29.7
1936	39	29.7
1937	31	29.7
1938	36	29.7
1939	27	29.7
1940	36	26.4
1941	23	26.4
1942	31	26.4
1943	33	26.4
1944	24	26.4
1945	22	26.4
1946	31	26.4
1947	27	26.4
1948	21	26.4
1949	16	26.4
1950	17	28.2
1951	23	28.2
1952	29	28.2
1954	19	28.2
1955	29	28.2
1956	26	28.2
1957	34	28.2
1958	38	28.2
1959	39	28.2
1960	42	31.7
1961	36	31.7
1962	33	31.7
1963	50	31.7
1964	23	31.7
1965	30	31.7
1966	24	31.7
1967	34	31.7
1968	19	31.7
1969	26	31.7
1970	24	31.2
1971	36	31.2
1972	24	31.2
1973	24	31.2
1974	41	31.2
1975	29	31.2
1976	47	31.2
1977	34	31.2
1978	28	31.2
1979	25	31.2
1980	24	33.6
1982	28	33.6
1984	33	33.6
1985	39	33.6
1986	28	33.6
1987	35	33.6
1988	38	33.6
1989	44	33.6
1990	35	32
1992	26	32
1993	31	32
1994	38	32
1995	32	32
1996	38	32
1997	24	32

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

First to last qualifying date each year at Mbulu (Bos)
Year	First date	Last date
1922	1922-01-08	1922-12-31
1923	1923-01-06	1923-12-27
1924	1924-01-12	1924-12-27
1925	1925-01-02	1925-11-23
1926	1926-01-11	1926-12-28
1927	1927-01-25	1927-12-29
1928	1928-01-04	1928-12-27
1930	1930-01-09	1930-12-31
1931	1931-01-01	1931-12-31
1932	1932-02-16	1932-12-19
1933	1933-02-17	1933-12-31
1934	1934-01-01	1934-12-25
1935	1935-02-18	1935-12-18
1936	1936-01-10	1936-12-11
1937	1937-01-06	1937-12-21
1938	1938-01-03	1938-12-31
1939	1939-01-01	1939-12-12
1940	1940-01-07	1940-12-21
1941	1941-01-14	1941-12-21
1942	1942-01-12	1942-12-25
1943	1943-01-15	1943-12-31
1944	1944-01-07	1944-12-31
1945	1945-01-06	1945-12-04
1946	1946-01-08	1946-11-25
1947	1947-01-02	1947-12-28
1948	1948-01-08	1948-12-20
1949	1949-01-05	1949-12-18
1950	1950-01-08	1950-09-25
1951	1951-01-07	1951-12-11
1952	1952-01-07	1952-12-16
1954	1954-01-02	1954-12-13
1955	1955-01-04	1955-12-20
1956	1956-01-27	1956-12-25
1957	1957-01-04	1957-12-28
1958	1958-01-01	1958-12-31
1959	1959-01-02	1959-12-21
1960	1960-01-03	1960-12-28
1961	1961-01-13	1961-12-25
1962	1962-01-19	1962-12-27
1963	1963-01-03	1963-12-31
1964	1964-02-01	1964-12-27
1965	1965-01-06	1965-12-16
1966	1966-01-07	1966-12-14
1967	1967-01-01	1967-12-23
1968	1968-02-15	1968-12-05
1969	1969-02-16	1969-12-16
1970	1970-01-16	1970-12-26
1971	1971-01-10	1971-12-11
1972	1972-01-10	1972-12-17
1973	1973-01-06	1973-12-31
1974	1974-01-07	1974-12-24
1975	1975-01-28	1975-12-28
1976	1976-01-04	1976-12-28
1977	1977-01-10	1977-12-31
1978	1978-01-10	1978-12-20
1979	1979-01-01	1979-11-13
1980	1980-01-09	1980-12-27
1982	1982-02-01	1982-11-15
1984	1984-01-09	1984-12-23
1985	1985-01-02	1985-12-23
1986	1986-01-01	1986-12-05
1987	1987-01-10	1987-12-22
1988	1988-01-06	1988-12-31
1989	1989-01-01	1989-12-24
1990	1990-01-02	1990-12-15
1992	1992-01-01	1992-12-13
1993	1993-01-09	1993-12-25
1994	1994-01-01	1994-12-24
1995	1995-01-08	1995-12-31
1996	1996-01-06	1996-12-30
1997	1997-01-02	1997-11-30

Every Fixed Threshold

Fixed thresholds at Mbulu (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	71	50	1963	24
25 mm (0.98 in): Days with 25 mm or more rain	70	19	1932	10
50 mm (1.97 in): Days with 50 mm or more rain	46	15	1932	1
100 mm (3.94 in): Days with 100 mm or more rain	6	4	1932	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

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Data for Mbulu (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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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

Mbulu (Bos) Threshold Days by Year

Key Facts for Mbulu (Bos) Thresholds

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

Every Fixed Threshold

Download the Data

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