St Thomas Threshold Days by Year (CA006137361)
17 fixed thresholds counted per year at St Thomas (CA006137361): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for St Thomas Thresholds
- St Thomas: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1977 with 46.
- St Thomas: days with 25 mm (0.98 in) or more of precipitation in 60 years, most in 1976 with 12.
- St Thomas: days with a maximum temperature at or above 30 C (86 F) in 54 years, most in 1955 with 39.
- St Thomas: days with a maximum temperature at or below 0 C (32 F) in 54 years, most in 1978 with 85.
- 17 fixed thresholds have at least one qualifying day at St Thomas.
Days at or above 30 C (86 F)
54 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1926 | 5 | 7 |
| 1927 | 7 | 7 |
| 1928 | 7 | 7 |
| 1929 | 9 | 7 |
| 1930 | 16 | 18.5 |
| 1931 | 24 | 18.5 |
| 1932 | 6 | 18.5 |
| 1933 | 27 | 18.5 |
| 1934 | 25 | 18.5 |
| 1935 | 13 | 18.5 |
| 1936 | 26 | 18.5 |
| 1937 | 18 | 18.5 |
| 1938 | 17 | 18.5 |
| 1939 | 13 | 18.5 |
| 1940 | 12 | 14 |
| 1941 | 22 | 14 |
| 1942 | 4 | 14 |
| 1943 | 6 | 14 |
| 1944 | 25 | 14 |
| 1945 | 5 | 14 |
| 1946 | 11 | 14 |
| 1947 | 17 | 14 |
| 1948 | 12 | 14 |
| 1949 | 26 | 14 |
| 1950 | 3 | 14.2 |
| 1951 | 3 | 14.2 |
| 1952 | 23 | 14.2 |
| 1953 | 19 | 14.2 |
| 1954 | 16 | 14.2 |
| 1955 | 39 | 14.2 |
| 1956 | 6 | 14.2 |
| 1957 | 8 | 14.2 |
| 1958 | 1 | 14.2 |
| 1959 | 24 | 14.2 |
| 1960 | 5 | 9.8 |
| 1961 | 7 | 9.8 |
| 1962 | 13 | 9.8 |
| 1963 | 15 | 9.8 |
| 1964 | 13 | 9.8 |
| 1965 | 5 | 9.8 |
| 1966 | 13 | 9.8 |
| 1967 | 3 | 9.8 |
| 1968 | 11 | 9.8 |
| 1969 | 13 | 9.8 |
| 1970 | 8 | 6.3 |
| 1971 | 9 | 6.3 |
| 1972 | 4 | 6.3 |
| 1973 | 13 | 6.3 |
| 1974 | 4 | 6.3 |
| 1975 | 6 | 6.3 |
| 1976 | 5 | 6.3 |
| 1977 | 4 | 6.3 |
| 1978 | 6 | 6.3 |
| 1979 | 4 | 6.3 |
| Year | First date | Last date |
|---|---|---|
| 1926 | 1926-07-08 | 1926-08-06 |
| 1927 | 1927-06-29 | 1927-09-15 |
| 1928 | 1928-07-02 | 1928-08-16 |
| 1929 | 1929-05-30 | 1929-09-04 |
| 1930 | 1930-07-13 | 1930-09-14 |
| 1931 | 1931-06-19 | 1931-09-22 |
| 1932 | 1932-07-13 | 1932-08-31 |
| 1933 | 1933-05-24 | 1933-09-08 |
| 1934 | 1934-05-21 | 1934-08-13 |
| 1935 | 1935-07-05 | 1935-08-12 |
| 1936 | 1936-05-08 | 1936-09-16 |
| 1937 | 1937-06-26 | 1937-09-03 |
| 1938 | 1938-06-23 | 1938-08-23 |
| 1939 | 1939-05-31 | 1939-09-16 |
| 1940 | 1940-07-20 | 1940-09-20 |
| 1941 | 1941-05-27 | 1941-09-09 |
| 1942 | 1942-06-30 | 1942-07-27 |
| 1943 | 1943-06-20 | 1943-07-10 |
| 1944 | 1944-05-31 | 1944-09-02 |
| 1945 | 1945-06-29 | 1945-08-28 |
| 1946 | 1946-06-30 | 1946-10-06 |
| 1947 | 1947-07-05 | 1947-09-07 |
| 1948 | 1948-06-23 | 1948-09-05 |
| 1949 | 1949-05-06 | 1949-08-27 |
| 1950 | 1950-06-24 | 1950-08-17 |
| 1951 | 1951-07-26 | 1951-08-30 |
| 1952 | 1952-06-06 | 1952-09-14 |
| 1953 | 1953-06-20 | 1953-09-04 |
| 1954 | 1954-06-10 | 1954-09-05 |
| 1955 | 1955-06-05 | 1955-09-19 |
| 1956 | 1956-06-12 | 1956-08-28 |
| 1957 | 1957-06-17 | 1957-08-03 |
| 1958 | 1958-07-02 | 1958-07-02 |
| 1959 | 1959-06-08 | 1959-09-09 |
| 1960 | 1960-07-09 | 1960-09-08 |
| 1961 | 1961-06-29 | 1961-09-11 |
| 1962 | 1962-05-14 | 1962-08-30 |
| 1963 | 1963-06-06 | 1963-07-28 |
| 1964 | 1964-06-13 | 1964-07-28 |
| 1965 | 1965-06-28 | 1965-09-18 |
| 1966 | 1966-06-23 | 1966-09-02 |
| 1967 | 1967-06-12 | 1967-06-16 |
| 1968 | 1968-06-07 | 1968-08-24 |
| 1969 | 1969-05-28 | 1969-09-01 |
| 1970 | 1970-06-11 | 1970-08-26 |
| 1971 | 1971-06-28 | 1971-09-08 |
| 1972 | 1972-07-20 | 1972-07-23 |
| 1973 | 1973-06-11 | 1973-09-04 |
| 1974 | 1974-07-03 | 1974-07-14 |
| 1975 | 1975-06-29 | 1975-08-02 |
| 1976 | 1976-06-10 | 1976-09-08 |
| 1977 | 1977-07-05 | 1977-07-20 |
| 1978 | 1978-06-27 | 1978-09-06 |
| 1979 | 1979-07-13 | 1979-07-16 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 54 | 39 | 1955 | 4 |
| 35 C (95 F): Days | 16 | 7 | 1936 | 1 |
| 90 F (32.2 C): Days | 39 | 18 | 1955 | 1 |
| 100 F (37.8 C): Days | 1 | 5 | 1936 | 5 |
| 0 C (32 F): Ice days (max | 54 | 85 | 1978 | 57 |
| 0 C (32 F): Frost days (min | 54 | 186 | 1926 | 138 |
| -10 C (14 F): Days with min | 54 | 66 | 1929 | 43 |
| -20 C (-4 F): Days with min | 46 | 22 | 1963 | 10 |
| -30 C (-22 F): Days with min | 10 | 2 | 1934 | 1 |
| 20 C (68 F): Tropical nights (min | 53 | 21 | 1955 | 5 |
| 25 C (77 F): Days with min | 1 | 1 | 1942 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 60 | 46 | 1977 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 60 | 12 | 1976 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 28 | 3 | 1968 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1968 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 51 | 8 | 1977 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 4 | 1 | 1883 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.
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).