Charlo A Threshold Days by Year (CA008100880)
14 fixed thresholds counted per year at Charlo A (CA008100880): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Charlo A Thresholds
- Charlo A: days with a maximum temperature at or above 30 C (86 F) in 17 years, most in 1970 with 15.
- Charlo A: days with a maximum temperature at or below 0 C (32 F) in 17 years, most in 1974 with 118.
- Charlo A: nights with a minimum temperature at or below 0 C (32 F) in 17 years, most in 1972 with 218.
- Charlo A: nights with a minimum temperature at or below -10 C (14 F) in 17 years, most in 1972 with 115.
- 14 fixed thresholds have at least one qualifying day at Charlo A.
Days at or above 30 C (86 F)
17 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1967 | 7 | 5 |
| 1968 | 5 | 5 |
| 1969 | 3 | 5 |
| 1970 | 15 | 5.9 |
| 1971 | 4 | 5.9 |
| 1972 | 3 | 5.9 |
| 1973 | 2 | 5.9 |
| 1974 | 3 | 5.9 |
| 1975 | 9 | 5.9 |
| 1976 | 10 | 5.9 |
| 1977 | 5 | 5.9 |
| 1978 | 2 | 5.9 |
| 1979 | 6 | 5.9 |
| 1980 | 1 | 4.3 |
| 1981 | 4 | 4.3 |
| 1982 | 5 | 4.3 |
| 1983 | 7 | 4.3 |
| Year | First date | Last date |
|---|---|---|
| 1967 | 1967-06-03 | 1967-08-16 |
| 1968 | 1968-07-09 | 1968-09-21 |
| 1969 | 1969-06-27 | 1969-08-01 |
| 1970 | 1970-06-09 | 1970-08-16 |
| 1971 | 1971-06-17 | 1971-08-11 |
| 1972 | 1972-05-27 | 1972-07-13 |
| 1973 | 1973-07-25 | 1973-08-18 |
| 1974 | 1974-06-08 | 1974-08-22 |
| 1975 | 1975-06-23 | 1975-08-10 |
| 1976 | 1976-06-05 | 1976-08-22 |
| 1977 | 1977-05-22 | 1977-08-29 |
| 1978 | 1978-06-12 | 1978-08-16 |
| 1979 | 1979-07-10 | 1979-08-04 |
| 1980 | 1980-08-01 | 1980-08-01 |
| 1981 | 1981-07-03 | 1981-08-01 |
| 1982 | 1982-05-29 | 1982-07-19 |
| 1983 | 1983-06-21 | 1983-09-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 17 | 15 | 1970 | 7 |
| 35 C (95 F): Days | 1 | 1 | 1983 | 1 |
| 90 F (32.2 C): Days | 13 | 6 | 1976 | 5 |
| 0 C (32 F): Ice days (max | 17 | 118 | 1974 | 88 |
| 0 C (32 F): Frost days (min | 17 | 218 | 1972 | 188 |
| -10 C (14 F): Days with min | 17 | 115 | 1972 | 84 |
| -20 C (-4 F): Days with min | 17 | 55 | 1972 | 26 |
| -30 C (-22 F): Days with min | 10 | 4 | 1972 | 2 |
| 20 C (68 F): Tropical nights (min | 3 | 1 | 1970 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 17 | 45 | 1981 | 37 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 17 | 13 | 1979 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 10 | 2 | 1979 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 17 | 24 | 1976 | 13 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 14 | 7 | 1974 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.
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).