O'Leary Threshold Days by Year (CA008300525)
13 fixed thresholds counted per year at O'Leary (CA008300525): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for O'Leary Thresholds
- O'Leary: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1972 with 51.
- O'Leary: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1981 with 16.
- O'Leary: days with 10 cm (3.9 in) or more of snowfall in 26 years, most in 1967 with 17.
- O'Leary: days with a maximum temperature at or below 0 C (32 F) in 23 years, most in 1967 with 104.
- 13 fixed thresholds have at least one qualifying day at O'Leary.
Days at or above 30 C (86 F)
15 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1962 | 1 | 1.4 |
| 1963 | 3 | 1.4 |
| 1965 | 1 | 1.4 |
| 1967 | 1 | 1.4 |
| 1968 | 1 | 1.4 |
| 1970 | 6 | 3.6 |
| 1972 | 2 | 3.6 |
| 1974 | 1 | 3.6 |
| 1975 | 4 | 3.6 |
| 1976 | 6 | 3.6 |
| 1977 | 5 | 3.6 |
| 1978 | 1 | 3.6 |
| 1980 | 1 | 1.7 |
| 1981 | 1 | 1.7 |
| 1982 | 3 | 1.7 |
| Year | First date | Last date |
|---|---|---|
| 1962 | 1962-06-16 | 1962-06-16 |
| 1963 | 1963-06-03 | 1963-07-27 |
| 1965 | 1965-08-15 | 1965-08-15 |
| 1967 | 1967-06-05 | 1967-06-05 |
| 1968 | 1968-07-16 | 1968-07-16 |
| 1970 | 1970-07-24 | 1970-08-16 |
| 1972 | 1972-05-29 | 1972-07-13 |
| 1974 | 1974-08-22 | 1974-08-22 |
| 1975 | 1975-06-24 | 1975-08-02 |
| 1976 | 1976-06-06 | 1976-08-22 |
| 1977 | 1977-05-22 | 1977-08-29 |
| 1978 | 1978-08-16 | 1978-08-16 |
| 1980 | 1980-06-26 | 1980-06-26 |
| 1981 | 1981-07-03 | 1981-07-03 |
| 1982 | 1982-07-08 | 1982-07-20 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 15 | 6 | 1970 | 3 |
| 90 F (32.2 C): Days | 4 | 3 | 1977 | 3 |
| 0 C (32 F): Ice days (max | 23 | 104 | 1967 | 77 |
| 0 C (32 F): Frost days (min | 23 | 193 | 1972 | 154 |
| -10 C (14 F): Days with min | 23 | 91 | 1972 | 54 |
| -20 C (-4 F): Days with min | 23 | 21 | 1972 | 4 |
| -30 C (-22 F): Days with min | 2 | 1 | 1976 | 1 |
| 20 C (68 F): Tropical nights (min | 8 | 3 | 1975 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 26 | 51 | 1972 | 37 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 26 | 16 | 1981 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 9 | 2 | 1973 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 26 | 17 | 1967 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 14 | 3 | 1970 | 3 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.
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).