Ellerslie Threshold Days by Year (CA008300420)
13 fixed thresholds counted per year at Ellerslie (CA008300420): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ellerslie Thresholds
- Ellerslie: days with 10 cm (3.9 in) or more of snowfall in 23 years, most in 1978 with 18.
- Ellerslie: days with a maximum temperature at or below 0 C (32 F) in 22 years, most in 1978 with 96.
- Ellerslie: nights with a minimum temperature at or below 0 C (32 F) in 22 years, most in 1972 with 187.
- Ellerslie: nights with a minimum temperature at or below -10 C (14 F) in 22 years, most in 1972 with 89.
- 13 fixed thresholds have at least one qualifying day at Ellerslie.
Days at or above 30 C (86 F)
20 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1946 | 3 | 8.3 |
| 1947 | 20 | 8.3 |
| 1948 | 2 | 8.3 |
| 1951 | 3 | 3 |
| 1966 | 1 | 1.3 |
| 1967 | 2 | 1.3 |
| 1969 | 1 | 1.3 |
| 1970 | 9 | 3.9 |
| 1971 | 1 | 3.9 |
| 1972 | 2 | 3.9 |
| 1973 | 1 | 3.9 |
| 1974 | 2 | 3.9 |
| 1975 | 8 | 3.9 |
| 1976 | 6 | 3.9 |
| 1977 | 5 | 3.9 |
| 1978 | 2 | 3.9 |
| 1979 | 3 | 3.9 |
| 1981 | 7 | 3.7 |
| 1982 | 2 | 3.7 |
| 1983 | 2 | 3.7 |
| Year | First date | Last date |
|---|---|---|
| 1946 | 1946-06-27 | 1946-07-19 |
| 1947 | 1947-06-23 | 1947-09-12 |
| 1948 | 1948-06-30 | 1948-07-01 |
| 1951 | 1951-06-21 | 1951-07-15 |
| 1966 | 1966-08-19 | 1966-08-19 |
| 1967 | 1967-06-05 | 1967-07-20 |
| 1969 | 1969-08-01 | 1969-08-01 |
| 1970 | 1970-07-24 | 1970-08-16 |
| 1971 | 1971-08-10 | 1971-08-10 |
| 1972 | 1972-05-29 | 1972-07-13 |
| 1973 | 1973-07-09 | 1973-07-09 |
| 1974 | 1974-08-12 | 1974-08-22 |
| 1975 | 1975-06-23 | 1975-08-11 |
| 1976 | 1976-06-06 | 1976-08-22 |
| 1977 | 1977-05-22 | 1977-08-29 |
| 1978 | 1978-08-12 | 1978-08-16 |
| 1979 | 1979-06-16 | 1979-08-05 |
| 1981 | 1981-07-03 | 1981-08-03 |
| 1982 | 1982-07-18 | 1982-07-19 |
| 1983 | 1983-07-04 | 1983-07-05 |
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 | 1947 | 2 |
| 90 F (32.2 C): Days | 9 | 9 | 1947 | 1 |
| 0 C (32 F): Ice days (max | 22 | 96 | 1978 | 66 |
| 0 C (32 F): Frost days (min | 22 | 187 | 1972 | 135 |
| -10 C (14 F): Days with min | 22 | 89 | 1972 | 49 |
| -20 C (-4 F): Days with min | 22 | 31 | 1948 | 6 |
| -30 C (-22 F): Days with min | 8 | 2 | 1948 | 2 |
| 20 C (68 F): Tropical nights (min | 15 | 7 | 1973 | 6 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 21 | 49 | 1972 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 21 | 12 | 1975 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 10 | 3 | 1979 | 3 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 23 | 18 | 1978 | 6 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 6 | 1978 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1946.
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).