Denver WSO City Threshold Days by Year (USW00093002)
15 fixed thresholds counted per year at Denver WSO City (USW00093002): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Denver WSO City Thresholds
- Denver WSO City: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1954 with 78.
- Denver WSO City: days with a maximum temperature at or above 90 F (32.2 C) in 52 years, most in 1936 with 43.
- Denver WSO City: days with a maximum temperature at or below 0 C (32 F) in 52 years, most in 1929 with 40.
- Denver WSO City: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1923 with 18.
- 15 fixed thresholds have at least one qualifying day at Denver WSO City.
Days at or above 30 C (86 F)
52 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1921 | 43 | 39 |
| 1922 | 57 | 39 |
| 1923 | 25 | 39 |
| 1924 | 51 | 39 |
| 1925 | 33 | 39 |
| 1926 | 34 | 39 |
| 1927 | 26 | 39 |
| 1928 | 36 | 39 |
| 1929 | 46 | 39 |
| 1930 | 41 | 58 |
| 1931 | 61 | 58 |
| 1932 | 51 | 58 |
| 1933 | 59 | 58 |
| 1934 | 72 | 58 |
| 1935 | 55 | 58 |
| 1936 | 67 | 58 |
| 1937 | 64 | 58 |
| 1938 | 40 | 58 |
| 1939 | 70 | 58 |
| 1940 | 49 | 47.9 |
| 1941 | 33 | 47.9 |
| 1942 | 41 | 47.9 |
| 1943 | 55 | 47.9 |
| 1944 | 54 | 47.9 |
| 1945 | 43 | 47.9 |
| 1946 | 54 | 47.9 |
| 1947 | 52 | 47.9 |
| 1949 | 50 | 47.9 |
| 1950 | 34 | 55.6 |
| 1951 | 46 | 55.6 |
| 1952 | 70 | 55.6 |
| 1953 | 53 | 55.6 |
| 1954 | 78 | 55.6 |
| 1955 | 59 | 55.6 |
| 1956 | 60 | 55.6 |
| 1957 | 44 | 55.6 |
| 1958 | 50 | 55.6 |
| 1959 | 62 | 55.6 |
| 1960 | 63 | 48.2 |
| 1961 | 39 | 48.2 |
| 1962 | 53 | 48.2 |
| 1963 | 55 | 48.2 |
| 1964 | 67 | 48.2 |
| 1965 | 31 | 48.2 |
| 1966 | 56 | 48.2 |
| 1967 | 28 | 48.2 |
| 1968 | 41 | 48.2 |
| 1969 | 49 | 48.2 |
| 1970 | 55 | 47.3 |
| 1971 | 49 | 47.3 |
| 1972 | 42 | 47.3 |
| 1973 | 43 | 47.3 |
| Year | First date | Last date |
|---|---|---|
| 1921 | 1921-06-11 | 1921-09-28 |
| 1922 | 1922-06-07 | 1922-10-04 |
| 1923 | 1923-05-31 | 1923-09-09 |
| 1924 | 1924-06-11 | 1924-09-25 |
| 1925 | 1925-05-19 | 1925-09-16 |
| 1926 | 1926-05-23 | 1926-10-17 |
| 1927 | 1927-05-16 | 1927-09-10 |
| 1928 | 1928-05-30 | 1928-09-19 |
| 1929 | 1929-06-09 | 1929-09-02 |
| 1930 | 1930-05-21 | 1930-09-18 |
| 1931 | 1931-05-26 | 1931-09-29 |
| 1932 | 1932-05-22 | 1932-09-17 |
| 1933 | 1933-05-31 | 1933-09-29 |
| 1934 | 1934-05-08 | 1934-10-07 |
| 1935 | 1935-06-09 | 1935-09-20 |
| 1936 | 1936-05-04 | 1936-09-14 |
| 1937 | 1937-06-11 | 1937-09-20 |
| 1938 | 1938-05-28 | 1938-09-09 |
| 1939 | 1939-05-19 | 1939-09-12 |
| 1940 | 1940-05-31 | 1940-09-08 |
| 1941 | 1941-05-12 | 1941-09-19 |
| 1942 | 1942-05-25 | 1942-09-17 |
| 1943 | 1943-06-18 | 1943-09-18 |
| 1944 | 1944-06-15 | 1944-09-22 |
| 1945 | 1945-06-13 | 1945-09-08 |
| 1946 | 1946-06-04 | 1946-09-14 |
| 1947 | 1947-06-08 | 1947-10-05 |
| 1949 | 1949-05-03 | 1949-09-24 |
| 1950 | 1950-06-06 | 1950-09-02 |
| 1951 | 1951-05-28 | 1951-09-11 |
| 1952 | 1952-06-06 | 1952-09-27 |
| 1953 | 1953-05-21 | 1953-10-01 |
| 1954 | 1954-05-20 | 1954-10-02 |
| 1955 | 1955-05-30 | 1955-09-16 |
| 1956 | 1956-06-01 | 1956-09-20 |
| 1957 | 1957-06-05 | 1957-09-29 |
| 1958 | 1958-05-21 | 1958-09-23 |
| 1959 | 1959-06-06 | 1959-09-12 |
| 1960 | 1960-06-03 | 1960-09-13 |
| 1961 | 1961-05-10 | 1961-08-29 |
| 1962 | 1962-05-09 | 1962-09-18 |
| 1963 | 1963-05-07 | 1963-09-18 |
| 1964 | 1964-05-16 | 1964-10-01 |
| 1965 | 1965-06-21 | 1965-09-13 |
| 1966 | 1966-05-06 | 1966-09-23 |
| 1967 | 1967-05-23 | 1967-10-03 |
| 1968 | 1968-05-29 | 1968-09-11 |
| 1969 | 1969-05-25 | 1969-09-06 |
| 1970 | 1970-05-17 | 1970-09-19 |
| 1971 | 1971-06-15 | 1971-09-13 |
| 1972 | 1972-06-01 | 1972-09-18 |
| 1973 | 1973-05-19 | 1973-10-24 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 52 | 78 | 1954 | 43 |
| 35 C (95 F): Days | 46 | 17 | 1936 | 6 |
| 90 F (32.2 C): Days | 52 | 43 | 1936 | 26 |
| 100 F (37.8 C): Days | 9 | 2 | 1954 | 1 |
| 0 C (32 F): Ice days (max | 52 | 40 | 1929 | 22 |
| 0 C (32 F): Frost days (min | 51 | 159 | 1923 | 115 |
| -10 C (14 F): Days with min | 51 | 45 | 1929 | 31 |
| -20 C (-4 F): Days with min | 29 | 10 | 1962 | 9 |
| -30 C (-22 F): Days with min | 1 | 1 | 1936 | 1 |
| 20 C (68 F): Tropical nights (min | 46 | 14 | 1954 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 52 | 18 | 1923 | 8 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 36 | 5 | 1969 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 7 | 1 | 1921 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 50 | 8 | 1946 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 8 | 2 | 1931 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.
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).