Riethoek Threshold Days by Year (SF002037370)
4 fixed thresholds counted per year at Riethoek (SF002037370): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Riethoek Thresholds
- Riethoek: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1974 with 43.
- Riethoek: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1974 with 16.
- Riethoek: days with 50 mm (1.97 in) or more of precipitation in 37 years, most in 1943 with 5.
- Riethoek: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1936 with 1.
- 4 fixed thresholds have at least one qualifying day at Riethoek.
Days with 10 mm (0.39 in) or more of precipitation
58 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1933 | 18 | 21.3 |
| 1934 | 24 | 21.3 |
| 1935 | 23 | 21.3 |
| 1936 | 23 | 21.3 |
| 1937 | 14 | 21.3 |
| 1938 | 18 | 21.3 |
| 1939 | 29 | 21.3 |
| 1940 | 23 | 20 |
| 1941 | 17 | 20 |
| 1942 | 24 | 20 |
| 1943 | 25 | 20 |
| 1944 | 7 | 20 |
| 1946 | 21 | 20 |
| 1947 | 19 | 20 |
| 1948 | 22 | 20 |
| 1949 | 22 | 20 |
| 1950 | 27 | 23.1 |
| 1951 | 17 | 23.1 |
| 1952 | 23 | 23.1 |
| 1954 | 19 | 23.1 |
| 1955 | 26 | 23.1 |
| 1956 | 30 | 23.1 |
| 1957 | 26 | 23.1 |
| 1958 | 16 | 23.1 |
| 1959 | 24 | 23.1 |
| 1960 | 21 | 21.2 |
| 1961 | 23 | 21.2 |
| 1962 | 24 | 21.2 |
| 1963 | 34 | 21.2 |
| 1964 | 14 | 21.2 |
| 1965 | 14 | 21.2 |
| 1966 | 18 | 21.2 |
| 1967 | 31 | 21.2 |
| 1968 | 15 | 21.2 |
| 1969 | 18 | 21.2 |
| 1970 | 12 | 25 |
| 1971 | 20 | 25 |
| 1972 | 29 | 25 |
| 1973 | 20 | 25 |
| 1974 | 43 | 25 |
| 1975 | 20 | 25 |
| 1976 | 33 | 25 |
| 1978 | 27 | 25 |
| 1979 | 21 | 25 |
| 1981 | 26 | 21.1 |
| 1982 | 19 | 21.1 |
| 1983 | 19 | 21.1 |
| 1984 | 14 | 21.1 |
| 1985 | 15 | 21.1 |
| 1986 | 22 | 21.1 |
| 1987 | 11 | 21.1 |
| 1988 | 39 | 21.1 |
| 1989 | 25 | 21.1 |
| 1990 | 16 | 17.6 |
| 1991 | 28 | 17.6 |
| 1992 | 9 | 17.6 |
| 1993 | 23 | 17.6 |
| 1995 | 12 | 17.6 |
| Year | First date | Last date |
|---|---|---|
| 1933 | 1933-01-01 | 1933-12-30 |
| 1934 | 1934-01-10 | 1934-12-25 |
| 1935 | 1935-01-12 | 1935-12-29 |
| 1936 | 1936-01-10 | 1936-11-26 |
| 1937 | 1937-01-22 | 1937-12-23 |
| 1938 | 1938-01-16 | 1938-12-27 |
| 1939 | 1939-01-21 | 1939-12-16 |
| 1940 | 1940-01-23 | 1940-12-21 |
| 1941 | 1941-01-01 | 1941-10-27 |
| 1942 | 1942-01-03 | 1942-12-25 |
| 1943 | 1943-01-07 | 1943-12-31 |
| 1944 | 1944-01-02 | 1944-09-18 |
| 1946 | 1946-01-08 | 1946-12-22 |
| 1947 | 1947-02-09 | 1947-12-30 |
| 1948 | 1948-01-02 | 1948-11-30 |
| 1949 | 1949-01-30 | 1949-12-28 |
| 1950 | 1950-01-05 | 1950-12-31 |
| 1951 | 1951-01-01 | 1951-11-05 |
| 1952 | 1952-01-25 | 1952-12-15 |
| 1954 | 1954-01-30 | 1954-12-26 |
| 1955 | 1955-01-20 | 1955-12-18 |
| 1956 | 1956-01-06 | 1956-12-24 |
| 1957 | 1957-01-24 | 1957-12-31 |
| 1958 | 1958-01-03 | 1958-12-27 |
| 1959 | 1959-01-01 | 1959-12-31 |
| 1960 | 1960-01-01 | 1960-11-23 |
| 1961 | 1961-01-27 | 1961-12-16 |
| 1962 | 1962-01-05 | 1962-12-27 |
| 1963 | 1963-01-04 | 1963-12-08 |
| 1964 | 1964-01-10 | 1964-12-04 |
| 1965 | 1965-01-10 | 1965-11-15 |
| 1966 | 1966-01-07 | 1966-12-31 |
| 1967 | 1967-01-01 | 1967-11-15 |
| 1968 | 1968-01-31 | 1968-12-07 |
| 1969 | 1969-01-06 | 1969-11-08 |
| 1970 | 1970-01-25 | 1970-12-06 |
| 1971 | 1971-01-06 | 1971-12-19 |
| 1972 | 1972-01-09 | 1972-11-23 |
| 1973 | 1973-02-03 | 1973-12-22 |
| 1974 | 1974-01-07 | 1974-12-20 |
| 1975 | 1975-01-22 | 1975-12-21 |
| 1976 | 1976-01-03 | 1976-12-24 |
| 1978 | 1978-01-04 | 1978-11-28 |
| 1979 | 1979-02-12 | 1979-12-25 |
| 1981 | 1981-01-24 | 1981-12-16 |
| 1982 | 1982-01-27 | 1982-12-02 |
| 1983 | 1983-01-14 | 1983-12-30 |
| 1984 | 1984-01-01 | 1984-11-28 |
| 1985 | 1985-01-14 | 1985-12-04 |
| 1986 | 1986-01-03 | 1986-11-21 |
| 1987 | 1987-02-10 | 1987-10-19 |
| 1988 | 1988-01-11 | 1988-12-18 |
| 1989 | 1989-01-04 | 1989-12-18 |
| 1990 | 1990-01-09 | 1990-12-29 |
| 1991 | 1991-01-06 | 1991-12-25 |
| 1992 | 1992-01-03 | 1992-11-10 |
| 1993 | 1993-01-26 | 1993-11-28 |
| 1995 | 1995-01-15 | 1995-12-25 |
Every Fixed Threshold
| 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 | 58 | 43 | 1974 | 12 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 58 | 16 | 1974 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 37 | 5 | 1943 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 6 | 1 | 1936 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1933.
Download the Data
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 . Last revised (2025-12-31).