Knoxville UNIV of Tenn Threshold Days by Year (USC00404955)
16 fixed thresholds counted per year at Knoxville UNIV of Tenn (USC00404955): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Knoxville UNIV of Tenn Thresholds
- Knoxville UNIV of Tenn: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1954 with 120.
- Knoxville UNIV of Tenn: days with a maximum temperature at or above 90 F (32.2 C) in 37 years, most in 1954 with 86.
- Knoxville UNIV of Tenn: nights with a minimum temperature at or below 0 C (32 F) in 37 years, most in 1963 with 91.
- Knoxville UNIV of Tenn: nights with a minimum temperature at or above 20 C (68 F) in 37 years, most in 1977 with 80.
- 16 fixed thresholds have at least one qualifying day at Knoxville UNIV of Tenn.
Days at or above 30 C (86 F)
37 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1944 | 100 | 84.3 |
| 1945 | 73 | 84.3 |
| 1946 | 64 | 84.3 |
| 1947 | 82 | 84.3 |
| 1948 | 92 | 84.3 |
| 1949 | 95 | 84.3 |
| 1950 | 31 | 98.3 |
| 1951 | 88 | 98.3 |
| 1952 | 105 | 98.3 |
| 1953 | 111 | 98.3 |
| 1954 | 120 | 98.3 |
| 1955 | 103 | 98.3 |
| 1956 | 102 | 98.3 |
| 1957 | 114 | 98.3 |
| 1958 | 102 | 98.3 |
| 1959 | 107 | 98.3 |
| 1960 | 96 | 64.7 |
| 1961 | 49 | 64.7 |
| 1962 | 67 | 64.7 |
| 1963 | 53 | 64.7 |
| 1964 | 57 | 64.7 |
| 1965 | 75 | 64.7 |
| 1966 | 64 | 64.7 |
| 1967 | 39 | 64.7 |
| 1968 | 68 | 64.7 |
| 1969 | 79 | 64.7 |
| 1970 | 89 | 56.9 |
| 1971 | 56 | 56.9 |
| 1972 | 53 | 56.9 |
| 1973 | 45 | 56.9 |
| 1974 | 43 | 56.9 |
| 1976 | 45 | 56.9 |
| 1977 | 71 | 56.9 |
| 1978 | 70 | 56.9 |
| 1979 | 40 | 56.9 |
| 1980 | 98 | 83.5 |
| 1981 | 69 | 83.5 |
| Year | First date | Last date |
|---|---|---|
| 1944 | 1944-05-11 | 1944-10-04 |
| 1945 | 1945-05-16 | 1945-09-30 |
| 1946 | 1946-04-21 | 1946-09-27 |
| 1947 | 1947-05-15 | 1947-10-21 |
| 1948 | 1948-04-24 | 1948-09-22 |
| 1949 | 1949-05-04 | 1949-10-11 |
| 1950 | 1950-05-04 | 1950-09-02 |
| 1951 | 1951-04-30 | 1951-10-07 |
| 1952 | 1952-04-21 | 1952-10-02 |
| 1953 | 1953-04-25 | 1953-10-22 |
| 1954 | 1954-04-16 | 1954-10-15 |
| 1955 | 1955-04-18 | 1955-09-30 |
| 1956 | 1956-04-28 | 1956-10-03 |
| 1957 | 1957-04-20 | 1957-09-23 |
| 1958 | 1958-04-25 | 1958-10-15 |
| 1959 | 1959-05-03 | 1959-10-07 |
| 1960 | 1960-04-14 | 1960-10-04 |
| 1961 | 1961-06-03 | 1961-09-26 |
| 1962 | 1962-05-01 | 1962-09-15 |
| 1963 | 1963-04-22 | 1963-09-22 |
| 1964 | 1964-05-20 | 1964-09-13 |
| 1965 | 1965-04-25 | 1965-09-23 |
| 1966 | 1966-05-24 | 1966-09-06 |
| 1967 | 1967-04-08 | 1967-09-21 |
| 1968 | 1968-05-25 | 1968-09-25 |
| 1969 | 1969-05-06 | 1969-09-08 |
| 1970 | 1970-04-20 | 1970-09-26 |
| 1971 | 1971-05-19 | 1971-10-01 |
| 1972 | 1972-04-16 | 1972-09-21 |
| 1973 | 1973-06-04 | 1973-09-27 |
| 1974 | 1974-05-18 | 1974-09-13 |
| 1976 | 1976-04-20 | 1976-09-10 |
| 1977 | 1977-05-17 | 1977-09-06 |
| 1978 | 1978-05-28 | 1978-09-26 |
| 1979 | 1979-05-12 | 1979-09-07 |
| 1980 | 1980-04-24 | 1980-09-25 |
| 1981 | 1981-05-31 | 1981-10-02 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 37 | 120 | 1954 | 69 |
| 35 C (95 F): Days | 26 | 40 | 1954 | 2 |
| 40 C (104 F): Days | 2 | 2 | 1952 | 1 |
| 90 F (32.2 C): Days | 37 | 86 | 1954 | 31 |
| 100 F (37.8 C): Days | 8 | 10 | 1952 | 3 |
| 0 C (32 F): Ice days (max | 36 | 17 | 1963 | 10 |
| 0 C (32 F): Frost days (min | 37 | 91 | 1963 | 75 |
| -10 C (14 F): Days with min | 32 | 16 | 1977 | 6 |
| -20 C (-4 F): Days with min | 2 | 2 | 1966 | 2 |
| 20 C (68 F): Tropical nights (min | 37 | 80 | 1977 | 52 |
| 25 C (77 F): Days with min | 8 | 2 | 1954 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 37 | 53 | 1972 | 42 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 37 | 18 | 1974 | 11 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 31 | 6 | 1961 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1944 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 10 | 3 | 1960 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.
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).