Glen Allan Threshold Days by Year
13 fixed thresholds counted per year at Glen Allan (CA006142803): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Glen Allan Thresholds
- Glen Allan: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1960 with 107.
- Glen Allan: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1976 with 183.
- Glen Allan: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1963 with 78.
- Glen Allan: nights with a minimum temperature at or below -20 C (-4 F) in 25 years, most in 1963 with 20.
- 13 fixed thresholds have at least one qualifying day at Glen Allan.
Days at or above 30 C (86 F)
21 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1959 | 6 | 6 |
| 1960 | 3 | 4.1 |
| 1962 | 1 | 4.1 |
| 1963 | 4 | 4.1 |
| 1964 | 3 | 4.1 |
| 1965 | 2 | 4.1 |
| 1966 | 5 | 4.1 |
| 1968 | 8 | 4.1 |
| 1969 | 7 | 4.1 |
| 1970 | 1 | 6 |
| 1971 | 4 | 6 |
| 1972 | 3 | 6 |
| 1973 | 13 | 6 |
| 1974 | 6 | 6 |
| 1975 | 6 | 6 |
| 1977 | 5 | 6 |
| 1978 | 10 | 6 |
| 1979 | 6 | 6 |
| 1980 | 2 | 5.7 |
| 1981 | 6 | 5.7 |
| 1983 | 9 | 5.7 |
| Year | First date | Last date |
|---|---|---|
| 1959 | 1959-08-14 | 1959-09-09 |
| 1960 | 1960-08-17 | 1960-09-08 |
| 1962 | 1962-07-08 | 1962-07-08 |
| 1963 | 1963-06-29 | 1963-07-28 |
| 1964 | 1964-06-29 | 1964-07-28 |
| 1965 | 1965-06-28 | 1965-08-06 |
| 1966 | 1966-06-26 | 1966-07-25 |
| 1968 | 1968-06-08 | 1968-08-24 |
| 1969 | 1969-06-26 | 1969-08-31 |
| 1970 | 1970-08-11 | 1970-08-11 |
| 1971 | 1971-06-28 | 1971-07-04 |
| 1972 | 1972-07-11 | 1972-07-22 |
| 1973 | 1973-07-07 | 1973-09-04 |
| 1974 | 1974-07-03 | 1974-08-21 |
| 1975 | 1975-06-22 | 1975-08-02 |
| 1977 | 1977-07-04 | 1977-07-20 |
| 1978 | 1978-05-27 | 1978-08-19 |
| 1979 | 1979-06-16 | 1979-07-24 |
| 1980 | 1980-06-26 | 1980-07-19 |
| 1981 | 1981-06-15 | 1981-07-19 |
| 1983 | 1983-06-14 | 1983-09-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 21 | 13 | 1973 | 9 |
| 90 F (32.2 C): Days | 7 | 2 | 1975 | 2 |
| 0 C (32 F): Ice days (max | 25 | 107 | 1960 | 72 |
| 0 C (32 F): Frost days (min | 25 | 183 | 1976 | 156 |
| -10 C (14 F): Days with min | 25 | 78 | 1963 | 44 |
| -20 C (-4 F): Days with min | 25 | 20 | 1963 | 5 |
| -30 C (-22 F): Days with min | 7 | 2 | 1976 | 2 |
| 20 C (68 F): Tropical nights (min | 25 | 9 | 1959 | 8 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 25 | 44 | 1965 | 36 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 25 | 10 | 1959 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 10 | 1 | 1961 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1968 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 24 | 8 | 1969 | 4 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-16).