West Yellowstone Threshold Days by Year (USC00248857)
15 fixed thresholds counted per year at West Yellowstone (USC00248857): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for West Yellowstone Thresholds
- West Yellowstone: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1968 with 25.
- West Yellowstone: days with a maximum temperature at or below 0 C (32 F) in 60 years, most in 1964 with 115.
- West Yellowstone: nights with a minimum temperature at or below 0 C (32 F) in 60 years, most in 1935 with 313.
- West Yellowstone: nights with a minimum temperature at or below -10 C (14 F) in 60 years, most in 1964 with 142.
- 15 fixed thresholds have at least one qualifying day at West Yellowstone.
Days at or above 30 C (86 F)
59 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1924 | 7 | 8 |
| 1926 | 6 | 8 |
| 1928 | 7 | 8 |
| 1929 | 12 | 8 |
| 1932 | 5 | 20.6 |
| 1933 | 26 | 20.6 |
| 1934 | 26 | 20.6 |
| 1935 | 25 | 20.6 |
| 1936 | 30 | 20.6 |
| 1938 | 4 | 20.6 |
| 1939 | 28 | 20.6 |
| 1940 | 32 | 15.1 |
| 1941 | 13 | 15.1 |
| 1942 | 31 | 15.1 |
| 1943 | 14 | 15.1 |
| 1944 | 4 | 15.1 |
| 1945 | 4 | 15.1 |
| 1946 | 18 | 15.1 |
| 1949 | 5 | 15.1 |
| 1950 | 6 | 9 |
| 1951 | 7 | 9 |
| 1952 | 4 | 9 |
| 1953 | 13 | 9 |
| 1954 | 11 | 9 |
| 1955 | 17 | 9 |
| 1956 | 10 | 9 |
| 1957 | 5 | 9 |
| 1958 | 6 | 9 |
| 1959 | 11 | 9 |
| 1960 | 19 | 12.2 |
| 1961 | 19 | 12.2 |
| 1962 | 2 | 12.2 |
| 1963 | 11 | 12.2 |
| 1964 | 13 | 12.2 |
| 1965 | 2 | 12.2 |
| 1966 | 21 | 12.2 |
| 1967 | 13 | 12.2 |
| 1968 | 7 | 12.2 |
| 1969 | 15 | 12.2 |
| 1970 | 20 | 8.6 |
| 1971 | 16 | 8.6 |
| 1972 | 5 | 8.6 |
| 1973 | 5 | 8.6 |
| 1974 | 10 | 8.6 |
| 1975 | 9 | 8.6 |
| 1976 | 5 | 8.6 |
| 1977 | 3 | 8.6 |
| 1978 | 4 | 8.6 |
| 1981 | 8 | 7.6 |
| 1982 | 8 | 7.6 |
| 1983 | 5 | 7.6 |
| 1984 | 8 | 7.6 |
| 1985 | 6 | 7.6 |
| 1986 | 2 | 7.6 |
| 1988 | 14 | 7.6 |
| 1989 | 10 | 7.6 |
| 1990 | 13 | 12 |
| 1992 | 4 | 12 |
| 1994 | 19 | 12 |
| Year | First date | Last date |
|---|---|---|
| 1924 | 1924-07-01 | 1924-09-04 |
| 1926 | 1926-06-26 | 1926-08-25 |
| 1928 | 1928-07-12 | 1928-08-12 |
| 1929 | 1929-07-12 | 1929-08-14 |
| 1932 | 1932-08-09 | 1932-08-19 |
| 1933 | 1933-07-05 | 1933-08-17 |
| 1934 | 1934-07-14 | 1934-08-28 |
| 1935 | 1935-07-12 | 1935-08-22 |
| 1936 | 1936-05-30 | 1936-08-09 |
| 1938 | 1938-07-13 | 1938-08-12 |
| 1939 | 1939-06-29 | 1939-08-27 |
| 1940 | 1940-06-18 | 1940-09-02 |
| 1941 | 1941-06-22 | 1941-08-08 |
| 1942 | 1942-07-03 | 1942-09-02 |
| 1943 | 1943-07-06 | 1943-08-14 |
| 1944 | 1944-07-18 | 1944-08-23 |
| 1945 | 1945-07-23 | 1945-08-01 |
| 1946 | 1946-07-12 | 1946-09-03 |
| 1949 | 1949-07-10 | 1949-08-06 |
| 1950 | 1950-08-31 | 1950-09-05 |
| 1951 | 1951-07-14 | 1951-08-17 |
| 1952 | 1952-07-09 | 1952-08-22 |
| 1953 | 1953-07-09 | 1953-08-13 |
| 1954 | 1954-06-23 | 1954-08-30 |
| 1955 | 1955-06-22 | 1955-09-04 |
| 1956 | 1956-07-09 | 1956-08-23 |
| 1957 | 1957-07-10 | 1957-08-10 |
| 1958 | 1958-08-02 | 1958-08-16 |
| 1959 | 1959-06-12 | 1959-08-08 |
| 1960 | 1960-07-13 | 1960-08-14 |
| 1961 | 1961-06-17 | 1961-08-23 |
| 1962 | 1962-06-29 | 1962-08-15 |
| 1963 | 1963-07-03 | 1963-08-14 |
| 1964 | 1964-07-08 | 1964-08-07 |
| 1965 | 1965-08-08 | 1965-08-09 |
| 1966 | 1966-06-28 | 1966-08-25 |
| 1967 | 1967-07-12 | 1967-09-05 |
| 1968 | 1968-07-03 | 1968-08-07 |
| 1969 | 1969-06-05 | 1969-08-24 |
| 1970 | 1970-06-21 | 1970-08-25 |
| 1971 | 1971-07-15 | 1971-08-27 |
| 1972 | 1972-07-13 | 1972-08-11 |
| 1973 | 1973-07-04 | 1973-08-20 |
| 1974 | 1974-06-14 | 1974-07-29 |
| 1975 | 1975-07-02 | 1975-07-27 |
| 1976 | 1976-07-06 | 1976-07-23 |
| 1977 | 1977-06-05 | 1977-07-17 |
| 1978 | 1978-07-24 | 1978-08-07 |
| 1981 | 1981-06-25 | 1981-08-26 |
| 1982 | 1982-07-21 | 1982-08-21 |
| 1983 | 1983-07-30 | 1983-08-10 |
| 1984 | 1984-06-28 | 1984-08-10 |
| 1985 | 1985-07-04 | 1985-08-25 |
| 1986 | 1986-08-10 | 1986-08-18 |
| 1988 | 1988-06-19 | 1988-08-25 |
| 1989 | 1989-07-03 | 1989-07-31 |
| 1990 | 1990-06-26 | 1990-09-14 |
| 1992 | 1992-07-31 | 1992-08-19 |
| 1994 | 1994-07-17 | 1994-08-20 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 59 | 32 | 1940 | 19 |
| 35 C (95 F): Days | 7 | 4 | 1936 | 1 |
| 90 F (32.2 C): Days | 38 | 11 | 1936 | 5 |
| 0 C (32 F): Ice days (max | 60 | 115 | 1964 | 99 |
| 0 C (32 F): Frost days (min | 60 | 313 | 1935 | 249 |
| -10 C (14 F): Days with min | 60 | 142 | 1964 | 86 |
| -20 C (-4 F): Days with min | 60 | 74 | 1985 | 38 |
| -30 C (-22 F): Days with min | 60 | 35 | 1932 | 11 |
| -40 C (-40 F): Days with min | 31 | 6 | 1924 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 62 | 25 | 1968 | 20 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 38 | 3 | 1938 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1986 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 53 | 24 | 1936 | 15 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 38 | 6 | 1985 | 4 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1962 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.
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).