Duval Threshold Days by Year (CA004012300)
15 fixed thresholds counted per year at Duval (CA004012300): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Duval Thresholds
- Duval: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1962 with 12.
- Duval: days with 25 mm (0.98 in) or more of precipitation in 22 years, most in 1974 with 5.
- Duval: days with a maximum temperature at or above 30 C (86 F) in 20 years, most in 1967 with 20.
- Duval: days with a maximum temperature at or below 0 C (32 F) in 20 years, most in 1965 with 132.
- 15 fixed thresholds have at least one qualifying day at Duval.
Days at or above 30 C (86 F)
20 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1964 | 15 | 13.3 |
| 1965 | 11 | 13.3 |
| 1966 | 12 | 13.3 |
| 1967 | 20 | 13.3 |
| 1968 | 5 | 13.3 |
| 1969 | 17 | 13.3 |
| 1970 | 17 | 13 |
| 1971 | 19 | 13 |
| 1972 | 13 | 13 |
| 1973 | 12 | 13 |
| 1974 | 12 | 13 |
| 1975 | 15 | 13 |
| 1976 | 5 | 13 |
| 1977 | 5 | 13 |
| 1978 | 12 | 13 |
| 1979 | 20 | 13 |
| 1980 | 18 | 14.3 |
| 1981 | 18 | 14.3 |
| 1982 | 4 | 14.3 |
| 1983 | 17 | 14.3 |
| Year | First date | Last date |
|---|---|---|
| 1964 | 1964-05-17 | 1964-08-09 |
| 1965 | 1965-06-10 | 1965-08-23 |
| 1966 | 1966-07-10 | 1966-09-11 |
| 1967 | 1967-06-26 | 1967-09-06 |
| 1968 | 1968-06-19 | 1968-09-11 |
| 1969 | 1969-05-26 | 1969-09-13 |
| 1970 | 1970-06-03 | 1970-08-24 |
| 1971 | 1971-05-13 | 1971-09-11 |
| 1972 | 1972-05-31 | 1972-08-29 |
| 1973 | 1973-06-23 | 1973-08-30 |
| 1974 | 1974-06-19 | 1974-08-06 |
| 1975 | 1975-06-24 | 1975-07-29 |
| 1976 | 1976-07-24 | 1976-09-05 |
| 1977 | 1977-05-12 | 1977-07-22 |
| 1978 | 1978-05-15 | 1978-09-04 |
| 1979 | 1979-06-12 | 1979-09-16 |
| 1980 | 1980-04-20 | 1980-09-07 |
| 1981 | 1981-05-21 | 1981-09-18 |
| 1982 | 1982-08-06 | 1982-09-08 |
| 1983 | 1983-07-06 | 1983-09-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 20 | 20 | 1967 | 17 |
| 35 C (95 F): Days | 12 | 5 | 1971 | 3 |
| 90 F (32.2 C): Days | 18 | 12 | 1967 | 7 |
| 100 F (37.8 C): Days | 1 | 1 | 1972 | 1 |
| 0 C (32 F): Ice days (max | 20 | 132 | 1965 | 120 |
| 0 C (32 F): Frost days (min | 20 | 205 | 1970 | 197 |
| -10 C (14 F): Days with min | 20 | 123 | 1966 | 98 |
| -20 C (-4 F): Days with min | 20 | 77 | 1972 | 35 |
| -30 C (-22 F): Days with min | 20 | 27 | 1972 | 14 |
| -40 C (-40 F): Days with min | 3 | 3 | 1972 | 1 |
| 20 C (68 F): Tropical nights (min | 12 | 4 | 1983 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 26 | 12 | 1962 | 10 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 22 | 5 | 1974 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 2 | 1966 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 17 | 6 | 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 1964.
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 (2026-10-17).