Plymouth 2 WSW Threshold Days by Year (USC00336729)
17 fixed thresholds counted per year at Plymouth 2 WSW (USC00336729): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Plymouth 2 WSW Thresholds
- Plymouth 2 WSW: nights with a minimum temperature at or below 0 C (32 F) in 45 years, most in 1980 with 171.
- Plymouth 2 WSW: nights with a minimum temperature at or below -10 C (14 F) in 45 years, most in 1978 with 66.
- Plymouth 2 WSW: nights with a minimum temperature at or above 20 C (68 F) in 45 years, most in 1949 with 28.
- Plymouth 2 WSW: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1972 with 48.
- 17 fixed thresholds have at least one qualifying day at Plymouth 2 WSW.
Days at or above 30 C (86 F)
44 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1936 | 65 | 52.3 |
| 1937 | 39 | 52.3 |
| 1938 | 44 | 52.3 |
| 1939 | 61 | 52.3 |
| 1940 | 40 | 48.6 |
| 1941 | 65 | 48.6 |
| 1942 | 48 | 48.6 |
| 1943 | 49 | 48.6 |
| 1944 | 67 | 48.6 |
| 1945 | 36 | 48.6 |
| 1946 | 43 | 48.6 |
| 1947 | 38 | 48.6 |
| 1948 | 39 | 48.6 |
| 1949 | 61 | 48.6 |
| 1950 | 20 | 39.2 |
| 1951 | 32 | 39.2 |
| 1952 | 58 | 39.2 |
| 1953 | 52 | 39.2 |
| 1954 | 40 | 39.2 |
| 1955 | 62 | 39.2 |
| 1956 | 25 | 39.2 |
| 1957 | 32 | 39.2 |
| 1958 | 14 | 39.2 |
| 1959 | 57 | 39.2 |
| 1960 | 27 | 28.9 |
| 1961 | 36 | 28.9 |
| 1963 | 26 | 28.9 |
| 1964 | 41 | 28.9 |
| 1965 | 29 | 28.9 |
| 1966 | 30 | 28.9 |
| 1967 | 16 | 28.9 |
| 1968 | 28 | 28.9 |
| 1969 | 27 | 28.9 |
| 1971 | 35 | 24.6 |
| 1972 | 16 | 24.6 |
| 1973 | 28 | 24.6 |
| 1974 | 19 | 24.6 |
| 1975 | 33 | 24.6 |
| 1976 | 22 | 24.6 |
| 1977 | 31 | 24.6 |
| 1978 | 31 | 24.6 |
| 1979 | 6 | 24.6 |
| 1980 | 21 | 14.5 |
| 1981 | 8 | 14.5 |
| Year | First date | Last date |
|---|---|---|
| 1936 | 1936-05-07 | 1936-09-23 |
| 1937 | 1937-05-31 | 1937-09-24 |
| 1938 | 1938-05-03 | 1938-09-12 |
| 1939 | 1939-05-19 | 1939-10-09 |
| 1940 | 1940-05-14 | 1940-09-21 |
| 1941 | 1941-05-05 | 1941-10-06 |
| 1942 | 1942-04-26 | 1942-09-18 |
| 1943 | 1943-06-02 | 1943-09-03 |
| 1944 | 1944-05-15 | 1944-09-19 |
| 1945 | 1945-06-14 | 1945-09-23 |
| 1946 | 1946-06-08 | 1946-10-06 |
| 1947 | 1947-06-10 | 1947-09-21 |
| 1948 | 1948-04-26 | 1948-09-19 |
| 1949 | 1949-05-04 | 1949-10-09 |
| 1950 | 1950-06-07 | 1950-08-28 |
| 1951 | 1951-06-01 | 1951-10-05 |
| 1952 | 1952-05-05 | 1952-10-01 |
| 1953 | 1953-05-25 | 1953-10-03 |
| 1954 | 1954-05-31 | 1954-10-02 |
| 1955 | 1955-05-03 | 1955-09-19 |
| 1956 | 1956-05-12 | 1956-09-05 |
| 1957 | 1957-06-14 | 1957-09-02 |
| 1958 | 1958-06-05 | 1958-09-06 |
| 1959 | 1959-05-02 | 1959-10-03 |
| 1960 | 1960-06-04 | 1960-09-09 |
| 1961 | 1961-06-11 | 1961-09-24 |
| 1963 | 1963-05-09 | 1963-10-07 |
| 1964 | 1964-05-19 | 1964-09-10 |
| 1965 | 1965-05-08 | 1965-09-22 |
| 1966 | 1966-06-09 | 1966-09-03 |
| 1967 | 1967-05-27 | 1967-08-16 |
| 1968 | 1968-06-06 | 1968-09-23 |
| 1969 | 1969-05-29 | 1969-09-04 |
| 1971 | 1971-06-04 | 1971-10-02 |
| 1972 | 1972-05-23 | 1972-08-26 |
| 1973 | 1973-06-03 | 1973-09-27 |
| 1974 | 1974-07-02 | 1974-08-27 |
| 1975 | 1975-05-19 | 1975-08-25 |
| 1976 | 1976-04-18 | 1976-09-09 |
| 1977 | 1977-05-17 | 1977-09-03 |
| 1978 | 1978-05-28 | 1978-09-22 |
| 1979 | 1979-05-10 | 1979-08-09 |
| 1980 | 1980-05-06 | 1980-09-22 |
| 1981 | 1981-06-30 | 1981-07-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 44 | 67 | 1944 | 8 |
| 35 C (95 F): Days | 24 | 13 | 1936 | 2 |
| 40 C (104 F): Days | 1 | 1 | 1936 | 1 |
| 90 F (32.2 C): Days | 43 | 40 | 1944 | 4 |
| 100 F (37.8 C): Days | 4 | 10 | 1936 | 2 |
| 0 C (32 F): Ice days (max | 44 | 68 | 1978 | 56 |
| 0 C (32 F): Frost days (min | 45 | 171 | 1980 | 162 |
| -10 C (14 F): Days with min | 45 | 66 | 1978 | 40 |
| -20 C (-4 F): Days with min | 37 | 27 | 1978 | 15 |
| 20 C (68 F): Tropical nights (min | 45 | 28 | 1949 | 1 |
| 25 C (77 F): Days with min | 2 | 2 | 1949 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 45 | 48 | 1972 | 32 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 45 | 14 | 1950 | 12 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 29 | 3 | 1937 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1969 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 23 | 4 | 1964 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1944 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.
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).