Mt Vernon 3 WNW Threshold Days by Year (USC00455678)
11 fixed thresholds counted per year at Mt Vernon 3 WNW (USC00455678): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Mt Vernon 3 WNW Thresholds
- Mt Vernon 3 WNW: nights with a minimum temperature at or below 0 C (32 F) in 46 years, most in 1985 with 94.
- Mt Vernon 3 WNW: days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 2004 with 36.
- Mt Vernon 3 WNW: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1990 with 8.
- Mt Vernon 3 WNW: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1958 with 14.
- 11 fixed thresholds have at least one qualifying day at Mt Vernon 3 WNW.
Days at or above 30 C (86 F)
39 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1956 | 2 | 6.7 |
| 1958 | 14 | 6.7 |
| 1959 | 4 | 6.7 |
| 1960 | 8 | 3.8 |
| 1961 | 6 | 3.8 |
| 1963 | 2 | 3.8 |
| 1965 | 3 | 3.8 |
| 1966 | 1 | 3.8 |
| 1967 | 5 | 3.8 |
| 1968 | 2 | 3.8 |
| 1969 | 3 | 3.8 |
| 1970 | 2 | 3.3 |
| 1971 | 5 | 3.3 |
| 1972 | 2 | 3.3 |
| 1973 | 1 | 3.3 |
| 1974 | 4 | 3.3 |
| 1976 | 1 | 3.3 |
| 1977 | 7 | 3.3 |
| 1978 | 5 | 3.3 |
| 1979 | 3 | 3.3 |
| 1981 | 5 | 2.3 |
| 1982 | 1 | 2.3 |
| 1983 | 1 | 2.3 |
| 1984 | 1 | 2.3 |
| 1985 | 4 | 2.3 |
| 1986 | 2 | 2.3 |
| 1987 | 1 | 2.3 |
| 1988 | 4 | 2.3 |
| 1989 | 2 | 2.3 |
| 1990 | 2 | 2.5 |
| 1991 | 1 | 2.5 |
| 1992 | 1 | 2.5 |
| 1993 | 2 | 2.5 |
| 1994 | 3 | 2.5 |
| 1995 | 4 | 2.5 |
| 1996 | 5 | 2.5 |
| 1997 | 2 | 2.5 |
| 2001 | 1 | 1 |
| 2004 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1956 | 1956-07-19 | 1956-07-20 |
| 1958 | 1958-06-17 | 1958-07-29 |
| 1959 | 1959-07-22 | 1959-08-01 |
| 1960 | 1960-07-06 | 1960-08-10 |
| 1961 | 1961-07-12 | 1961-08-13 |
| 1963 | 1963-05-21 | 1963-05-22 |
| 1965 | 1965-07-29 | 1965-07-31 |
| 1966 | 1966-08-21 | 1966-08-21 |
| 1967 | 1967-06-19 | 1967-09-15 |
| 1968 | 1968-07-31 | 1968-08-01 |
| 1969 | 1969-05-23 | 1969-06-18 |
| 1970 | 1970-06-01 | 1970-06-02 |
| 1971 | 1971-07-26 | 1971-08-10 |
| 1972 | 1972-08-08 | 1972-08-09 |
| 1973 | 1973-09-05 | 1973-09-05 |
| 1974 | 1974-08-29 | 1974-09-14 |
| 1976 | 1976-09-20 | 1976-09-20 |
| 1977 | 1977-08-09 | 1977-08-18 |
| 1978 | 1978-07-21 | 1978-08-09 |
| 1979 | 1979-07-16 | 1979-09-14 |
| 1981 | 1981-08-08 | 1981-09-07 |
| 1982 | 1982-06-18 | 1982-06-18 |
| 1983 | 1983-05-29 | 1983-05-29 |
| 1984 | 1984-07-23 | 1984-07-23 |
| 1985 | 1985-07-09 | 1985-08-17 |
| 1986 | 1986-06-13 | 1986-09-06 |
| 1987 | 1987-06-29 | 1987-06-29 |
| 1988 | 1988-07-25 | 1988-09-03 |
| 1989 | 1989-06-24 | 1989-06-25 |
| 1990 | 1990-07-21 | 1990-08-11 |
| 1991 | 1991-07-23 | 1991-07-23 |
| 1992 | 1992-08-13 | 1992-08-13 |
| 1993 | 1993-08-04 | 1993-09-07 |
| 1994 | 1994-07-20 | 1994-07-22 |
| 1995 | 1995-06-29 | 1995-07-19 |
| 1996 | 1996-07-24 | 1996-08-29 |
| 1997 | 1997-08-14 | 1997-08-17 |
| 2001 | 2001-08-10 | 2001-08-10 |
| 2004 | 2004-08-09 | 2004-08-09 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 39 | 14 | 1958 | 1 |
| 35 C (95 F): Days | 1 | 2 | 1960 | 2 |
| 90 F (32.2 C): Days | 15 | 5 | 1958 | 1 |
| 0 C (32 F): Ice days (max | 32 | 13 | 1972 | 3 |
| 0 C (32 F): Frost days (min | 46 | 94 | 1985 | 32 |
| -10 C (14 F): Days with min | 26 | 11 | 1957 | 2 |
| -20 C (-4 F): Days with min | 1 | 1 | 1957 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 46 | 36 | 2004 | 36 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 41 | 8 | 1990 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 11 | 2 | 1990 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 6 | 3 | 1971 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.
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).