Riverside 7 SSW Threshold Days by Year (USC00357208)
17 fixed thresholds counted per year at Riverside 7 SSW (USC00357208): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Riverside 7 SSW Thresholds
- Riverside 7 SSW: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1899 with 11.
- Riverside 7 SSW: days with a maximum temperature at or above 30 C (86 F) in 56 years, most in 1904 with 108.
- Riverside 7 SSW: days with a maximum temperature at or above 35 C (95 F) in 56 years, most in 1904 with 69.
- Riverside 7 SSW: days with a maximum temperature at or above 90 F (32.2 C) in 56 years, most in 1904 with 87.
- 17 fixed thresholds have at least one qualifying day at Riverside 7 SSW.
Days at or above 30 C (86 F)
56 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1898 | 76 | 70 |
| 1899 | 64 | 70 |
| 1901 | 70 | 88.3 |
| 1904 | 108 | 88.3 |
| 1905 | 87 | 88.3 |
| 1912 | 56 | 79.8 |
| 1913 | 78 | 79.8 |
| 1915 | 84 | 79.8 |
| 1916 | 72 | 79.8 |
| 1918 | 83 | 79.8 |
| 1919 | 106 | 79.8 |
| 1920 | 70 | 65.7 |
| 1921 | 75 | 65.7 |
| 1923 | 60 | 65.7 |
| 1924 | 53 | 65.7 |
| 1927 | 64 | 65.7 |
| 1929 | 72 | 65.7 |
| 1930 | 87 | 72.4 |
| 1931 | 77 | 72.4 |
| 1932 | 62 | 72.4 |
| 1933 | 46 | 72.4 |
| 1935 | 80 | 72.4 |
| 1936 | 84 | 72.4 |
| 1938 | 72 | 72.4 |
| 1939 | 71 | 72.4 |
| 1940 | 79 | 73.5 |
| 1942 | 68 | 73.5 |
| 1967 | 91 | 77.3 |
| 1968 | 67 | 77.3 |
| 1969 | 74 | 77.3 |
| 1970 | 69 | 57.9 |
| 1971 | 54 | 57.9 |
| 1972 | 58 | 57.9 |
| 1973 | 65 | 57.9 |
| 1974 | 62 | 57.9 |
| 1975 | 45 | 57.9 |
| 1976 | 39 | 57.9 |
| 1977 | 69 | 57.9 |
| 1978 | 50 | 57.9 |
| 1979 | 68 | 57.9 |
| 1980 | 58 | 66.9 |
| 1981 | 74 | 66.9 |
| 1982 | 57 | 66.9 |
| 1983 | 57 | 66.9 |
| 1984 | 73 | 66.9 |
| 1985 | 57 | 66.9 |
| 1986 | 78 | 66.9 |
| 1987 | 73 | 66.9 |
| 1988 | 84 | 66.9 |
| 1989 | 58 | 66.9 |
| 1990 | 81 | 63.7 |
| 1993 | 35 | 63.7 |
| 1994 | 80 | 63.7 |
| 1995 | 57 | 63.7 |
| 1996 | 66 | 63.7 |
| 1997 | 63 | 63.7 |
| Year | First date | Last date |
|---|---|---|
| 1898 | 1898-04-25 | 1898-09-26 |
| 1899 | 1899-06-22 | 1899-09-29 |
| 1901 | 1901-05-10 | 1901-09-11 |
| 1904 | 1904-05-20 | 1904-10-05 |
| 1905 | 1905-05-16 | 1905-09-30 |
| 1912 | 1912-06-01 | 1912-09-18 |
| 1913 | 1913-05-06 | 1913-09-29 |
| 1915 | 1915-06-20 | 1915-09-21 |
| 1916 | 1916-06-04 | 1916-09-24 |
| 1918 | 1918-05-03 | 1918-09-29 |
| 1919 | 1919-05-19 | 1919-09-26 |
| 1920 | 1920-05-19 | 1920-09-18 |
| 1921 | 1921-06-07 | 1921-10-10 |
| 1923 | 1923-05-24 | 1923-09-14 |
| 1924 | 1924-05-14 | 1924-09-03 |
| 1927 | 1927-04-25 | 1927-09-21 |
| 1929 | 1929-05-22 | 1929-09-17 |
| 1930 | 1930-05-27 | 1930-09-20 |
| 1931 | 1931-05-24 | 1931-09-14 |
| 1932 | 1932-05-13 | 1932-10-02 |
| 1933 | 1933-06-11 | 1933-10-08 |
| 1935 | 1935-05-21 | 1935-09-10 |
| 1936 | 1936-04-17 | 1936-10-12 |
| 1938 | 1938-05-25 | 1938-09-26 |
| 1939 | 1939-04-28 | 1939-09-24 |
| 1940 | 1940-05-10 | 1940-08-31 |
| 1942 | 1942-06-29 | 1942-10-06 |
| 1967 | 1967-05-17 | 1967-09-29 |
| 1968 | 1968-04-29 | 1968-09-26 |
| 1969 | 1969-05-09 | 1969-09-26 |
| 1970 | 1970-05-16 | 1970-08-31 |
| 1971 | 1971-06-20 | 1971-09-12 |
| 1972 | 1972-05-28 | 1972-09-04 |
| 1973 | 1973-05-14 | 1973-09-13 |
| 1974 | 1974-06-10 | 1974-09-25 |
| 1975 | 1975-06-01 | 1975-10-02 |
| 1976 | 1976-05-13 | 1976-09-10 |
| 1977 | 1977-04-23 | 1977-09-12 |
| 1978 | 1978-06-05 | 1978-09-26 |
| 1979 | 1979-05-21 | 1979-10-06 |
| 1980 | 1980-05-20 | 1980-10-07 |
| 1981 | 1981-04-30 | 1981-09-19 |
| 1982 | 1982-05-25 | 1982-09-09 |
| 1983 | 1983-05-24 | 1983-09-16 |
| 1984 | 1984-05-29 | 1984-09-20 |
| 1985 | 1985-05-25 | 1985-08-29 |
| 1986 | 1986-05-25 | 1986-09-07 |
| 1987 | 1987-04-26 | 1987-10-02 |
| 1988 | 1988-05-11 | 1988-10-08 |
| 1989 | 1989-06-07 | 1989-09-29 |
| 1990 | 1990-05-05 | 1990-10-03 |
| 1993 | 1993-05-10 | 1993-09-30 |
| 1994 | 1994-05-09 | 1994-09-28 |
| 1995 | 1995-06-12 | 1995-09-17 |
| 1996 | 1996-06-03 | 1996-10-09 |
| 1997 | 1997-05-10 | 1997-09-24 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 56 | 108 | 1904 | 63 |
| 35 C (95 F): Days | 56 | 69 | 1904 | 9 |
| 40 C (104 F): Days | 27 | 11 | 1905 | 7 |
| 90 F (32.2 C): Days | 56 | 87 | 1904 | 33 |
| 100 F (37.8 C): Days | 49 | 20 | 1904 | 2 |
| 110 F (43.3 C): Days | 2 | 2 | 1905 | 1 |
| 0 C (32 F): Ice days (max | 56 | 59 | 1985 | 6 |
| 0 C (32 F): Frost days (min | 51 | 241 | 1899 | 182 |
| -10 C (14 F): Days with min | 51 | 83 | 1905 | 34 |
| -20 C (-4 F): Days with min | 40 | 24 | 1985 | 3 |
| -30 C (-22 F): Days with min | 10 | 4 | 1924 | 2 |
| -40 C (-40 F): Days with min | 2 | 3 | 1924 | 1 |
| 20 C (68 F): Tropical nights (min | 22 | 6 | 1913 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 67 | 11 | 1899 | 7 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 19 | 3 | 1913 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 25 | 4 | 1977 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 1930 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.
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).