Anderson Dam Threshold Days by Year (USC00100282)
16 fixed thresholds counted per year at Anderson Dam (USC00100282): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Anderson Dam Thresholds
- Anderson Dam: days with 10 cm (3.9 in) or more of snowfall in 51 years, most in 1951 with 12.
- Anderson Dam: nights with a minimum temperature at or below 0 C (32 F) in 40 years, most in 1944 with 166.
- Anderson Dam: nights with a minimum temperature at or below -10 C (14 F) in 40 years, most in 1952 with 52.
- Anderson Dam: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1970 with 33.
- 16 fixed thresholds have at least one qualifying day at Anderson Dam.
Days at or above 30 C (86 F)
38 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1942 | 70 | 71.5 |
| 1943 | 82 | 71.5 |
| 1944 | 65 | 71.5 |
| 1945 | 65 | 71.5 |
| 1946 | 73 | 71.5 |
| 1947 | 70 | 71.5 |
| 1948 | 71 | 71.5 |
| 1949 | 76 | 71.5 |
| 1950 | 62 | 67.2 |
| 1951 | 49 | 67.2 |
| 1952 | 66 | 67.2 |
| 1954 | 72 | 67.2 |
| 1955 | 70 | 67.2 |
| 1956 | 68 | 67.2 |
| 1957 | 72 | 67.2 |
| 1958 | 79 | 67.2 |
| 1959 | 67 | 67.2 |
| 1960 | 74 | 67.1 |
| 1961 | 81 | 67.1 |
| 1962 | 61 | 67.1 |
| 1963 | 61 | 67.1 |
| 1964 | 58 | 67.1 |
| 1965 | 44 | 67.1 |
| 1966 | 80 | 67.1 |
| 1967 | 81 | 67.1 |
| 1968 | 61 | 67.1 |
| 1969 | 70 | 67.1 |
| 1970 | 75 | 67.1 |
| 1971 | 65 | 67.1 |
| 1972 | 73 | 67.1 |
| 1973 | 77 | 67.1 |
| 1974 | 75 | 67.1 |
| 1975 | 58 | 67.1 |
| 1976 | 54 | 67.1 |
| 1977 | 72 | 67.1 |
| 1978 | 51 | 67.1 |
| 1979 | 71 | 67.1 |
| 1980 | 45 | 45 |
| Year | First date | Last date |
|---|---|---|
| 1942 | 1942-05-22 | 1942-10-09 |
| 1943 | 1943-06-17 | 1943-10-04 |
| 1944 | 1944-06-24 | 1944-10-07 |
| 1945 | 1945-06-20 | 1945-10-07 |
| 1946 | 1946-04-25 | 1946-09-29 |
| 1947 | 1947-05-02 | 1947-10-04 |
| 1948 | 1948-05-24 | 1948-10-12 |
| 1949 | 1949-05-13 | 1949-09-28 |
| 1950 | 1950-06-04 | 1950-10-13 |
| 1951 | 1951-05-27 | 1951-09-17 |
| 1952 | 1952-06-02 | 1952-09-26 |
| 1954 | 1954-05-08 | 1954-09-21 |
| 1955 | 1955-06-07 | 1955-09-13 |
| 1956 | 1956-06-08 | 1956-10-04 |
| 1957 | 1957-06-01 | 1957-09-30 |
| 1958 | 1958-05-18 | 1958-09-11 |
| 1959 | 1959-05-13 | 1959-09-12 |
| 1960 | 1960-05-10 | 1960-09-27 |
| 1961 | 1961-05-25 | 1961-09-05 |
| 1962 | 1962-06-18 | 1962-09-26 |
| 1963 | 1963-06-18 | 1963-10-02 |
| 1964 | 1964-05-16 | 1964-10-07 |
| 1965 | 1965-06-06 | 1965-10-08 |
| 1966 | 1966-05-02 | 1966-09-24 |
| 1967 | 1967-05-21 | 1967-09-29 |
| 1968 | 1968-05-28 | 1968-09-13 |
| 1969 | 1969-05-23 | 1969-09-27 |
| 1970 | 1970-05-16 | 1970-09-03 |
| 1971 | 1971-06-20 | 1971-09-12 |
| 1972 | 1972-05-16 | 1972-09-04 |
| 1973 | 1973-05-13 | 1973-09-29 |
| 1974 | 1974-06-11 | 1974-09-25 |
| 1975 | 1975-05-14 | 1975-10-03 |
| 1976 | 1976-05-13 | 1976-09-11 |
| 1977 | 1977-04-24 | 1977-09-10 |
| 1978 | 1978-06-12 | 1978-09-27 |
| 1979 | 1979-05-22 | 1979-09-24 |
| 1980 | 1980-05-20 | 1980-09-07 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 38 | 82 | 1943 | 45 |
| 35 C (95 F): Days | 38 | 41 | 1942 | 9 |
| 40 C (104 F): Days | 16 | 2 | 1946 | 1 |
| 90 F (32.2 C): Days | 38 | 64 | 1961 | 26 |
| 100 F (37.8 C): Days | 34 | 14 | 1942 | 4 |
| 0 C (32 F): Ice days (max | 38 | 49 | 1949 | 17 |
| 0 C (32 F): Frost days (min | 40 | 166 | 1944 | 151 |
| -10 C (14 F): Days with min | 40 | 52 | 1952 | 11 |
| -20 C (-4 F): Days with min | 23 | 23 | 1949 | 1 |
| 20 C (68 F): Tropical nights (min | 20 | 4 | 1960 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 40 | 33 | 1970 | 21 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 36 | 8 | 1975 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 4 | 1 | 1960 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 51 | 12 | 1951 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 28 | 3 | 1975 | 2 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1967 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1942.
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).