Jhb-Norwood Threshold Days by Year (SF004761290)

5 fixed thresholds counted per year at Jhb-Norwood (SF004761290): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jhb-Norwood Thresholds

Jhb-Norwood: days with 10 mm (0.39 in) or more of precipitation in 80 years, most in 1917 with 40.
Jhb-Norwood: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1942 with 14.
Jhb-Norwood: days with 50 mm (1.97 in) or more of precipitation in 51 years, most in 1917 with 4.
Jhb-Norwood: days with 100 mm (3.94 in) or more of precipitation in 10 years, most in 1944 with 2.
5 fixed thresholds have at least one qualifying day at Jhb-Norwood.

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

80 years with a qualifying day

Days per year at Jhb-Norwood with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Jhb-Norwood
Year	Days	Decade average
1914	22	29.2
1915	35	29.2
1916	24	29.2
1917	40	29.2
1918	36	29.2
1919	18	29.2
1920	25	26.7
1921	30	26.7
1922	33	26.7
1923	22	26.7
1924	27	26.7
1925	31	26.7
1926	22	26.7
1927	23	26.7
1928	27	26.7
1930	20	22.8
1931	27	22.8
1932	16	22.8
1933	23	22.8
1934	27	22.8
1935	18	22.8
1936	26	22.8
1937	29	22.8
1938	14	22.8
1939	28	22.8
1940	31	27.5
1941	21	27.5
1942	34	27.5
1943	29	27.5
1944	28	27.5
1945	16	27.5
1946	31	27.5
1947	29	27.5
1948	21	27.5
1949	35	27.5
1950	28	27.4
1951	22	27.4
1952	32	27.4
1954	21	27.4
1956	27	27.4
1957	33	27.4
1958	34	27.4
1959	22	27.4
1960	27	26.8
1961	29	26.8
1962	19	26.8
1963	24	26.8
1964	32	26.8
1965	18	26.8
1966	29	26.8
1967	39	26.8
1968	24	26.8
1969	27	26.8
1970	25	27.1
1971	35	27.1
1972	19	27.1
1973	29	27.1
1974	28	27.1
1975	26	27.1
1976	28	27.1
1977	26	27.1
1978	27	27.1
1979	28	27.1
1980	30	23.5
1981	24	23.5
1982	18	23.5
1983	25	23.5
1984	21	23.5
1985	20	23.5
1986	26	23.5
1987	27	23.5
1988	21	23.5
1989	23	23.5
1990	23	19.3
1991	15	19.3
1992	15	19.3
1993	24	19.3
1994	22	19.3
1995	18	19.3
1996	18	19.3

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

First to last qualifying date each year at Jhb-Norwood
Year	First date	Last date
1914	1914-02-19	1914-12-22
1915	1915-01-05	1915-12-25
1916	1916-01-03	1916-12-28
1917	1917-01-05	1917-12-31
1918	1918-01-04	1918-12-31
1919	1919-01-02	1919-12-15
1920	1920-01-01	1920-12-22
1921	1921-01-06	1921-12-28
1922	1922-01-11	1922-12-29
1923	1923-01-01	1923-12-19
1924	1924-01-09	1924-12-29
1925	1925-01-02	1925-12-09
1926	1926-01-13	1926-12-28
1927	1927-01-02	1927-12-23
1928	1928-01-01	1928-12-09
1930	1930-01-01	1930-12-23
1931	1931-01-07	1931-12-26
1932	1932-01-06	1932-12-24
1933	1933-01-02	1933-12-31
1934	1934-01-02	1934-11-27
1935	1935-01-10	1935-12-31
1936	1936-01-07	1936-12-28
1937	1937-01-03	1937-12-30
1938	1938-01-16	1938-10-22
1939	1939-01-01	1939-12-28
1940	1940-01-15	1940-12-28
1941	1941-01-14	1941-12-20
1942	1942-01-02	1942-12-31
1943	1943-02-04	1943-12-30
1944	1944-01-02	1944-12-31
1945	1945-01-04	1945-12-02
1946	1946-01-02	1946-12-22
1947	1947-01-03	1947-12-30
1948	1948-01-04	1948-11-23
1949	1949-01-01	1949-12-30
1950	1950-01-03	1950-12-30
1951	1951-01-01	1951-12-22
1952	1952-01-03	1952-12-28
1954	1954-01-02	1954-12-11
1956	1956-01-13	1956-12-27
1957	1957-01-11	1957-12-20
1958	1958-01-09	1958-12-22
1959	1959-01-22	1959-12-31
1960	1960-01-16	1960-12-27
1961	1961-01-05	1961-12-26
1962	1962-01-21	1962-12-28
1963	1963-01-06	1963-12-13
1964	1964-01-04	1964-12-28
1965	1965-01-07	1965-12-28
1966	1966-01-17	1966-12-20
1967	1967-01-03	1967-12-28
1968	1968-01-06	1968-12-20
1969	1969-01-08	1969-12-30
1970	1970-01-05	1970-12-25
1971	1971-01-01	1971-12-27
1972	1972-01-14	1972-12-25
1973	1973-01-02	1973-12-19
1974	1974-01-06	1974-12-28
1975	1975-01-15	1975-12-26
1976	1976-01-13	1976-12-23
1977	1977-01-19	1977-12-31
1978	1978-01-01	1978-12-21
1979	1979-01-12	1979-12-23
1980	1980-01-06	1980-12-26
1981	1981-01-20	1981-12-27
1982	1982-01-13	1982-12-28
1983	1983-01-01	1983-12-25
1984	1984-01-01	1984-12-18
1985	1985-01-06	1985-12-31
1986	1986-01-19	1986-12-28
1987	1987-01-07	1987-12-27
1988	1988-01-10	1988-12-26
1989	1989-01-04	1989-12-28
1990	1990-01-21	1990-12-16
1991	1991-01-01	1991-12-30
1992	1992-01-13	1992-12-21
1993	1993-01-04	1993-12-30
1994	1994-01-09	1994-12-31
1995	1995-01-10	1995-12-31
1996	1996-01-10	1996-12-30

Every Fixed Threshold

Fixed thresholds at Jhb-Norwood
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	80	40	1917	18
25 mm (0.98 in): Days with 25 mm or more rain	80	14	1942	7
50 mm (1.97 in): Days with 50 mm or more rain	51	4	1917	3
100 mm (3.94 in): Days with 100 mm or more rain	10	2	1944	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

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Data for Jhb-Norwood 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).

Jhb-Norwood Threshold Days by Year (SF004761290)

Key Facts for Jhb-Norwood Thresholds

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

Every Fixed Threshold

Download the Data

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