Poortjie Threshold Days by Year (SF004338040)

4 fixed thresholds counted per year at Poortjie (SF004338040): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Poortjie Thresholds

Poortjie: days with 10 mm (0.39 in) or more of precipitation in 82 years, most in 1909 with 27.
Poortjie: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1943 with 11.
Poortjie: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1909 with 3.
Poortjie: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1913 with 1.
4 fixed thresholds have at least one qualifying day at Poortjie.

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

82 years with a qualifying day

Days per year at Poortjie with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1909.

Days with 10 mm (0.39 in) or more of precipitation per year at Poortjie
Year	Days	Decade average
1905	13	18.6
1906	10	18.6
1907	26	18.6
1908	17	18.6
1909	27	18.6
1910	14	13.1
1911	18	13.1
1912	9	13.1
1913	16	13.1
1914	11	13.1
1915	14	13.1
1916	8	13.1
1917	10	13.1
1918	17	13.1
1919	14	13.1
1920	12	11.9
1921	12	11.9
1922	9	11.9
1923	12	11.9
1924	21	11.9
1927	6	11.9
1929	11	11.9
1930	13	14.6
1931	13	14.6
1932	12	14.6
1933	14	14.6
1934	22	14.6
1935	14	14.6
1936	16	14.6
1937	15	14.6
1938	14	14.6
1939	13	14.6
1940	11	15.8
1941	10	15.8
1942	12	15.8
1943	23	15.8
1944	19	15.8
1945	16	15.8
1946	21	15.8
1947	15	15.8
1948	18	15.8
1949	13	15.8
1950	25	21.7
1951	22	21.7
1952	17	21.7
1954	13	21.7
1955	20	21.7
1956	27	21.7
1957	27	21.7
1958	26	21.7
1959	18	21.7
1960	15	16.1
1961	18	16.1
1962	17	16.1
1963	25	16.1
1964	11	16.1
1965	8	16.1
1966	15	16.1
1967	23	16.1
1968	15	16.1
1969	14	16.1
1970	13	19
1971	19	19
1972	19	19
1973	9	19
1974	25	19
1975	27	19
1977	24	19
1978	18	19
1979	17	19
1980	9	15.7
1981	17	15.7
1982	12	15.7
1983	9	15.7
1984	14	15.7
1985	18	15.7
1986	21	15.7
1987	15	15.7
1988	22	15.7
1989	20	15.7
1990	14	14.5
1991	15	14.5

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

First to last qualifying date each year at Poortjie
Year	First date	Last date
1905	1905-01-18	1905-12-13
1906	1906-02-02	1906-11-22
1907	1907-01-07	1907-12-15
1908	1908-01-08	1908-12-16
1909	1909-01-05	1909-12-26
1910	1910-01-16	1910-12-29
1911	1911-01-04	1911-12-01
1912	1912-01-02	1912-12-30
1913	1913-01-04	1913-11-17
1914	1914-02-07	1914-12-17
1915	1915-01-13	1915-12-28
1916	1916-01-01	1916-12-20
1917	1917-02-01	1917-12-10
1918	1918-01-06	1918-12-31
1919	1919-01-01	1919-11-28
1920	1920-01-13	1920-04-12
1921	1921-02-03	1921-12-28
1922	1922-01-16	1922-12-28
1923	1923-01-08	1923-11-20
1924	1924-01-24	1924-12-28
1927	1927-01-03	1927-12-28
1929	1929-01-07	1929-12-19
1930	1930-01-02	1930-11-15
1931	1931-01-14	1931-11-03
1932	1932-02-13	1932-12-25
1933	1933-01-16	1933-12-27
1934	1934-01-01	1934-12-26
1935	1935-01-12	1935-12-29
1936	1936-01-06	1936-11-20
1937	1937-01-03	1937-12-23
1938	1938-01-10	1938-12-29
1939	1939-02-07	1939-11-26
1940	1940-03-01	1940-12-28
1941	1941-01-21	1941-12-18
1942	1942-02-20	1942-12-16
1943	1943-01-04	1943-12-31
1944	1944-01-03	1944-10-25
1945	1945-01-07	1945-12-30
1946	1946-01-07	1946-11-25
1947	1947-01-13	1947-12-31
1948	1948-01-03	1948-11-20
1949	1949-01-19	1949-12-18
1950	1950-01-04	1950-12-31
1951	1951-01-02	1951-12-16
1952	1952-01-28	1952-12-24
1954	1954-02-12	1954-12-26
1955	1955-01-17	1955-12-18
1956	1956-01-01	1956-12-22
1957	1957-01-11	1957-12-31
1958	1958-01-12	1958-12-28
1959	1959-01-06	1959-12-24
1960	1960-01-22	1960-12-20
1961	1961-01-14	1961-12-17
1962	1962-01-02	1962-12-26
1963	1963-01-08	1963-12-05
1964	1964-01-18	1964-12-27
1965	1965-01-14	1965-11-14
1966	1966-01-16	1966-12-19
1967	1967-01-01	1967-12-20
1968	1968-01-19	1968-12-09
1969	1969-01-16	1969-12-31
1970	1970-01-09	1970-12-27
1971	1971-01-05	1971-12-17
1972	1972-01-04	1972-11-23
1973	1973-03-26	1973-12-22
1974	1974-01-01	1974-12-10
1975	1975-01-14	1975-12-29
1977	1977-01-09	1977-12-01
1978	1978-01-01	1978-12-30
1979	1979-01-01	1979-12-09
1980	1980-01-16	1980-11-26
1981	1981-01-22	1981-12-17
1982	1982-01-04	1982-12-18
1983	1983-01-12	1983-12-30
1984	1984-03-21	1984-12-15
1985	1985-01-14	1985-12-17
1986	1986-01-19	1986-12-09
1987	1987-01-31	1987-12-17
1988	1988-02-09	1988-12-23
1989	1989-01-05	1989-12-08
1990	1990-01-07	1990-12-03
1991	1991-01-06	1991-10-19

Every Fixed Threshold

Fixed thresholds at Poortjie
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	82	27	1909	15
25 mm (0.98 in): Days with 25 mm or more rain	80	11	1943	7
50 mm (1.97 in): Days with 50 mm or more rain	45	3	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1913	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

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Data for Poortjie 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).

Poortjie Threshold Days by Year (SF004338040)

Key Facts for Poortjie Thresholds

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

Every Fixed Threshold

Download the Data

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