Grand Forks Threshold Days by Year (CA001133270)
15 fixed thresholds counted per year at Grand Forks (CA001133270): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Grand Forks Thresholds
- Grand Forks: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1983 with 20.
- Grand Forks: days with a maximum temperature at or above 30 C (86 F) in 42 years, most in 1958 with 67.
- Grand Forks: days with a maximum temperature at or above 90 F (32.2 C) in 42 years, most in 1958 with 47.
- Grand Forks: days with a maximum temperature at or below 0 C (32 F) in 42 years, most in 1955 with 75.
- 15 fixed thresholds have at least one qualifying day at Grand Forks.
Days at or above 30 C (86 F)
42 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1941 | 43 | 41.6 |
| 1942 | 45 | 41.6 |
| 1944 | 53 | 41.6 |
| 1945 | 39 | 41.6 |
| 1946 | 56 | 41.6 |
| 1947 | 27 | 41.6 |
| 1948 | 21 | 41.6 |
| 1949 | 49 | 41.6 |
| 1950 | 46 | 38.1 |
| 1951 | 38 | 38.1 |
| 1952 | 39 | 38.1 |
| 1953 | 30 | 38.1 |
| 1954 | 20 | 38.1 |
| 1955 | 42 | 38.1 |
| 1956 | 42 | 38.1 |
| 1957 | 27 | 38.1 |
| 1958 | 67 | 38.1 |
| 1959 | 30 | 38.1 |
| 1960 | 39 | 35.4 |
| 1961 | 49 | 35.4 |
| 1962 | 28 | 35.4 |
| 1963 | 33 | 35.4 |
| 1964 | 15 | 35.4 |
| 1965 | 32 | 35.4 |
| 1966 | 29 | 35.4 |
| 1967 | 61 | 35.4 |
| 1968 | 25 | 35.4 |
| 1969 | 43 | 35.4 |
| 1970 | 51 | 37.3 |
| 1971 | 42 | 37.3 |
| 1972 | 30 | 37.3 |
| 1973 | 44 | 37.3 |
| 1974 | 43 | 37.3 |
| 1975 | 25 | 37.3 |
| 1976 | 17 | 37.3 |
| 1977 | 44 | 37.3 |
| 1978 | 30 | 37.3 |
| 1979 | 47 | 37.3 |
| 1980 | 18 | 25.8 |
| 1981 | 33 | 25.8 |
| 1982 | 30 | 25.8 |
| 1983 | 22 | 25.8 |
| Year | First date | Last date |
|---|---|---|
| 1941 | 1941-05-23 | 1941-08-22 |
| 1942 | 1942-06-29 | 1942-09-25 |
| 1944 | 1944-06-11 | 1944-09-14 |
| 1945 | 1945-06-17 | 1945-10-08 |
| 1946 | 1946-05-12 | 1946-09-03 |
| 1947 | 1947-05-07 | 1947-09-04 |
| 1948 | 1948-05-26 | 1948-09-13 |
| 1949 | 1949-05-08 | 1949-09-28 |
| 1950 | 1950-06-11 | 1950-09-22 |
| 1951 | 1951-05-22 | 1951-09-17 |
| 1952 | 1952-06-09 | 1952-09-26 |
| 1953 | 1953-07-06 | 1953-09-15 |
| 1954 | 1954-05-18 | 1954-08-30 |
| 1955 | 1955-06-09 | 1955-09-11 |
| 1956 | 1956-05-17 | 1956-09-18 |
| 1957 | 1957-04-29 | 1957-09-15 |
| 1958 | 1958-05-18 | 1958-09-11 |
| 1959 | 1959-06-19 | 1959-09-12 |
| 1960 | 1960-06-24 | 1960-09-14 |
| 1961 | 1961-05-25 | 1961-08-29 |
| 1962 | 1962-06-16 | 1962-09-20 |
| 1963 | 1963-05-22 | 1963-09-11 |
| 1964 | 1964-07-01 | 1964-08-22 |
| 1965 | 1965-06-09 | 1965-08-22 |
| 1966 | 1966-05-04 | 1966-09-22 |
| 1967 | 1967-06-15 | 1967-09-27 |
| 1968 | 1968-06-18 | 1968-09-05 |
| 1969 | 1969-05-24 | 1969-09-12 |
| 1970 | 1970-05-16 | 1970-08-31 |
| 1971 | 1971-06-22 | 1971-08-30 |
| 1972 | 1972-05-29 | 1972-08-29 |
| 1973 | 1973-05-14 | 1973-09-11 |
| 1974 | 1974-06-11 | 1974-09-17 |
| 1975 | 1975-06-01 | 1975-09-07 |
| 1976 | 1976-06-28 | 1976-09-01 |
| 1977 | 1977-04-23 | 1977-08-22 |
| 1978 | 1978-06-02 | 1978-08-10 |
| 1979 | 1979-06-02 | 1979-09-19 |
| 1980 | 1980-05-05 | 1980-08-11 |
| 1981 | 1981-06-25 | 1981-09-18 |
| 1982 | 1982-06-11 | 1982-08-26 |
| 1983 | 1983-05-24 | 1983-08-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 42 | 67 | 1958 | 22 |
| 35 C (95 F): Days | 39 | 24 | 1958 | 1 |
| 40 C (104 F): Days | 1 | 2 | 1941 | 2 |
| 90 F (32.2 C): Days | 42 | 47 | 1958 | 6 |
| 100 F (37.8 C): Days | 15 | 5 | 1960 | 3 |
| 0 C (32 F): Ice days (max | 42 | 75 | 1955 | 41 |
| 0 C (32 F): Frost days (min | 42 | 199 | 1952 | 136 |
| -10 C (14 F): Days with min | 42 | 64 | 1944 | 28 |
| -20 C (-4 F): Days with min | 39 | 25 | 1949 | 9 |
| -30 C (-22 F): Days with min | 13 | 14 | 1950 | 2 |
| 20 C (68 F): Tropical nights (min | 3 | 1 | 1941 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 43 | 20 | 1983 | 20 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 15 | 3 | 1981 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 37 | 6 | 1951 | 4 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1945 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.
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).