Duncan Lake Dam Threshold Days by Year (CA001142574)
14 fixed thresholds counted per year at Duncan Lake Dam (CA001142574): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Duncan Lake Dam Thresholds
- Duncan Lake Dam: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1967 with 42.
- Duncan Lake Dam: days with a maximum temperature at or below 0 C (32 F) in 19 years, most in 1975 with 56.
- Duncan Lake Dam: nights with a minimum temperature at or below 0 C (32 F) in 19 years, most in 1982 with 201.
- Duncan Lake Dam: nights with a minimum temperature at or below -10 C (14 F) in 19 years, most in 1975 with 53.
- 14 fixed thresholds have at least one qualifying day at Duncan Lake Dam.
Days at or above 30 C (86 F)
19 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1965 | 18 | 18.8 |
| 1966 | 12 | 18.8 |
| 1967 | 42 | 18.8 |
| 1968 | 13 | 18.8 |
| 1969 | 9 | 18.8 |
| 1970 | 25 | 18 |
| 1971 | 25 | 18 |
| 1972 | 14 | 18 |
| 1973 | 27 | 18 |
| 1974 | 17 | 18 |
| 1975 | 13 | 18 |
| 1976 | 3 | 18 |
| 1977 | 19 | 18 |
| 1978 | 14 | 18 |
| 1979 | 23 | 18 |
| 1980 | 2 | 5.3 |
| 1981 | 6 | 5.3 |
| 1982 | 6 | 5.3 |
| 1983 | 7 | 5.3 |
| Year | First date | Last date |
|---|---|---|
| 1965 | 1965-06-09 | 1965-08-22 |
| 1966 | 1966-05-05 | 1966-08-25 |
| 1967 | 1967-06-15 | 1967-09-01 |
| 1968 | 1968-07-02 | 1968-08-02 |
| 1969 | 1969-06-03 | 1969-08-24 |
| 1970 | 1970-06-03 | 1970-08-25 |
| 1971 | 1971-07-16 | 1971-08-29 |
| 1972 | 1972-07-05 | 1972-08-29 |
| 1973 | 1973-05-15 | 1973-09-10 |
| 1974 | 1974-06-12 | 1974-08-04 |
| 1975 | 1975-07-01 | 1975-07-27 |
| 1976 | 1976-06-29 | 1976-07-18 |
| 1977 | 1977-06-06 | 1977-08-21 |
| 1978 | 1978-06-03 | 1978-08-08 |
| 1979 | 1979-06-28 | 1979-08-23 |
| 1980 | 1980-07-22 | 1980-07-28 |
| 1981 | 1981-08-08 | 1981-08-24 |
| 1982 | 1982-06-12 | 1982-08-07 |
| 1983 | 1983-05-28 | 1983-08-09 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 19 | 42 | 1967 | 7 |
| 35 C (95 F): Days | 6 | 5 | 1975 | 2 |
| 90 F (32.2 C): Days | 17 | 24 | 1967 | 1 |
| 0 C (32 F): Ice days (max | 19 | 56 | 1975 | 34 |
| 0 C (32 F): Frost days (min | 19 | 201 | 1982 | 170 |
| -10 C (14 F): Days with min | 19 | 53 | 1975 | 22 |
| -20 C (-4 F): Days with min | 15 | 17 | 1979 | 10 |
| -30 C (-22 F): Days with min | 1 | 1 | 1968 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 19 | 30 | 1972 | 19 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 15 | 5 | 1982 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1971 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 19 | 13 | 1975 | 6 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 3 | 1975 | 3 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 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 1965.
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 (2026-10-17).