Knightville Dam Threshold Days by Year (USC00193985)
17 fixed thresholds counted per year at Knightville Dam (USC00193985): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Knightville Dam Thresholds
- Knightville Dam: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1983 with 52.
- Knightville Dam: days with 25 mm (0.98 in) or more of precipitation in 46 years, most in 1983 with 21.
- Knightville Dam: days with a maximum temperature at or above 30 C (86 F) in 42 years, most in 1955 with 50.
- Knightville Dam: days with a maximum temperature at or below 0 C (32 F) in 42 years, most in 1970 with 64.
- 17 fixed thresholds have at least one qualifying day at Knightville Dam.
Days at or above 30 C (86 F)
42 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1949 | 44 | 44 |
| 1950 | 32 | 31.6 |
| 1951 | 36 | 31.6 |
| 1952 | 35 | 31.6 |
| 1953 | 44 | 31.6 |
| 1954 | 22 | 31.6 |
| 1955 | 50 | 31.6 |
| 1956 | 21 | 31.6 |
| 1957 | 28 | 31.6 |
| 1958 | 13 | 31.6 |
| 1959 | 35 | 31.6 |
| 1960 | 9 | 22.1 |
| 1961 | 21 | 22.1 |
| 1962 | 15 | 22.1 |
| 1963 | 20 | 22.1 |
| 1964 | 20 | 22.1 |
| 1965 | 31 | 22.1 |
| 1966 | 38 | 22.1 |
| 1967 | 22 | 22.1 |
| 1968 | 24 | 22.1 |
| 1969 | 21 | 22.1 |
| 1970 | 24 | 20.2 |
| 1971 | 21 | 20.2 |
| 1972 | 14 | 20.2 |
| 1973 | 29 | 20.2 |
| 1974 | 15 | 20.2 |
| 1975 | 24 | 20.2 |
| 1976 | 18 | 20.2 |
| 1977 | 19 | 20.2 |
| 1978 | 18 | 20.2 |
| 1979 | 20 | 20.2 |
| 1980 | 30 | 22.3 |
| 1981 | 18 | 22.3 |
| 1982 | 12 | 22.3 |
| 1983 | 40 | 22.3 |
| 1984 | 17 | 22.3 |
| 1985 | 11 | 22.3 |
| 1986 | 11 | 22.3 |
| 1987 | 25 | 22.3 |
| 1988 | 40 | 22.3 |
| 1989 | 19 | 22.3 |
| 1990 | 18 | 18 |
| Year | First date | Last date |
|---|---|---|
| 1949 | 1949-05-05 | 1949-10-11 |
| 1950 | 1950-05-06 | 1950-10-01 |
| 1951 | 1951-05-15 | 1951-09-12 |
| 1952 | 1952-06-17 | 1952-09-14 |
| 1953 | 1953-05-11 | 1953-09-06 |
| 1954 | 1954-04-22 | 1954-10-13 |
| 1955 | 1955-05-23 | 1955-09-19 |
| 1956 | 1956-06-01 | 1956-09-06 |
| 1957 | 1957-05-10 | 1957-09-17 |
| 1958 | 1958-07-01 | 1958-09-01 |
| 1959 | 1959-05-21 | 1959-09-25 |
| 1960 | 1960-06-28 | 1960-09-09 |
| 1961 | 1961-05-15 | 1961-09-13 |
| 1962 | 1962-04-28 | 1962-09-02 |
| 1963 | 1963-06-10 | 1963-10-08 |
| 1964 | 1964-05-08 | 1964-09-12 |
| 1965 | 1965-05-10 | 1965-09-24 |
| 1966 | 1966-06-05 | 1966-09-03 |
| 1967 | 1967-06-03 | 1967-08-20 |
| 1968 | 1968-06-07 | 1968-08-26 |
| 1969 | 1969-04-29 | 1969-09-02 |
| 1970 | 1970-05-11 | 1970-09-26 |
| 1971 | 1971-06-08 | 1971-09-06 |
| 1972 | 1972-07-03 | 1972-08-27 |
| 1973 | 1973-04-23 | 1973-09-05 |
| 1974 | 1974-05-16 | 1974-08-21 |
| 1975 | 1975-05-21 | 1975-08-11 |
| 1976 | 1976-04-18 | 1976-08-24 |
| 1977 | 1977-05-19 | 1977-09-03 |
| 1978 | 1978-05-21 | 1978-09-22 |
| 1979 | 1979-05-10 | 1979-08-06 |
| 1980 | 1980-05-24 | 1980-09-23 |
| 1981 | 1981-05-26 | 1981-08-11 |
| 1982 | 1982-07-08 | 1982-08-06 |
| 1983 | 1983-06-13 | 1983-09-21 |
| 1984 | 1984-05-27 | 1984-08-09 |
| 1985 | 1985-05-12 | 1985-09-05 |
| 1986 | 1986-05-20 | 1986-07-27 |
| 1987 | 1987-05-30 | 1987-08-20 |
| 1988 | 1988-05-29 | 1988-08-17 |
| 1989 | 1989-05-19 | 1989-09-11 |
| 1990 | 1990-04-28 | 1990-10-08 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 42 | 50 | 1955 | 18 |
| 35 C (95 F): Days | 14 | 8 | 1953 | 2 |
| 90 F (32.2 C): Days | 41 | 30 | 1955 | 5 |
| 100 F (37.8 C): Days | 2 | 1 | 1953 | 1 |
| 0 C (32 F): Ice days (max | 42 | 64 | 1970 | 25 |
| 0 C (32 F): Frost days (min | 42 | 205 | 1956 | 164 |
| -10 C (14 F): Days with min | 42 | 79 | 1989 | 28 |
| -20 C (-4 F): Days with min | 41 | 20 | 1963 | 5 |
| -30 C (-22 F): Days with min | 5 | 5 | 1971 | 2 |
| 20 C (68 F): Tropical nights (min | 28 | 6 | 1955 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 46 | 52 | 1983 | 43 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 46 | 21 | 1983 | 17 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 39 | 8 | 1955 | 4 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 4 | 2 | 1955 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1955 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 40 | 11 | 1956 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 17 | 2 | 1956 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.
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).