Plymouth Threshold Days by Year (USC00276944)
17 fixed thresholds counted per year at Plymouth (USC00276944): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Plymouth Thresholds
- Plymouth: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 1900 with 40.
- Plymouth: days with a maximum temperature at or below 0 C (32 F) in 60 years, most in 1904 with 94.
- Plymouth: nights with a minimum temperature at or below 0 C (32 F) in 59 years, most in 1940 with 207.
- Plymouth: nights with a minimum temperature at or below -10 C (14 F) in 59 years, most in 1893 with 99.
- 17 fixed thresholds have at least one qualifying day at Plymouth.
Days at or above 30 C (86 F)
60 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1888 | 24 | 24 |
| 1890 | 21 | 29.3 |
| 1891 | 22 | 29.3 |
| 1893 | 30 | 29.3 |
| 1894 | 23 | 29.3 |
| 1895 | 32 | 29.3 |
| 1896 | 34 | 29.3 |
| 1897 | 25 | 29.3 |
| 1898 | 38 | 29.3 |
| 1899 | 39 | 29.3 |
| 1900 | 40 | 24.9 |
| 1901 | 33 | 24.9 |
| 1902 | 17 | 24.9 |
| 1903 | 18 | 24.9 |
| 1904 | 18 | 24.9 |
| 1905 | 27 | 24.9 |
| 1906 | 36 | 24.9 |
| 1907 | 22 | 24.9 |
| 1908 | 21 | 24.9 |
| 1909 | 17 | 24.9 |
| 1910 | 13 | 14.5 |
| 1911 | 18 | 14.5 |
| 1912 | 13 | 14.5 |
| 1913 | 15 | 14.5 |
| 1914 | 18 | 14.5 |
| 1915 | 5 | 14.5 |
| 1916 | 14 | 14.5 |
| 1917 | 11 | 14.5 |
| 1918 | 15 | 14.5 |
| 1919 | 23 | 14.5 |
| 1920 | 9 | 8.1 |
| 1921 | 19 | 8.1 |
| 1922 | 3 | 8.1 |
| 1923 | 9 | 8.1 |
| 1924 | 4 | 8.1 |
| 1925 | 8 | 8.1 |
| 1926 | 2 | 8.1 |
| 1927 | 2 | 8.1 |
| 1928 | 6 | 8.1 |
| 1929 | 19 | 8.1 |
| 1930 | 14 | 19.4 |
| 1931 | 17 | 19.4 |
| 1932 | 6 | 19.4 |
| 1933 | 18 | 19.4 |
| 1934 | 21 | 19.4 |
| 1935 | 20 | 19.4 |
| 1936 | 25 | 19.4 |
| 1937 | 32 | 19.4 |
| 1938 | 20 | 19.4 |
| 1939 | 21 | 19.4 |
| 1940 | 24 | 25.2 |
| 1941 | 28 | 25.2 |
| 1942 | 18 | 25.2 |
| 1943 | 25 | 25.2 |
| 1944 | 33 | 25.2 |
| 1945 | 21 | 25.2 |
| 1946 | 16 | 25.2 |
| 1947 | 26 | 25.2 |
| 1949 | 36 | 25.2 |
| 1950 | 30 | 30 |
| Year | First date | Last date |
|---|---|---|
| 1888 | 1888-06-05 | 1888-08-26 |
| 1890 | 1890-06-11 | 1890-08-11 |
| 1891 | 1891-05-10 | 1891-09-18 |
| 1893 | 1893-05-11 | 1893-08-28 |
| 1894 | 1894-05-01 | 1894-09-05 |
| 1895 | 1895-05-03 | 1895-09-23 |
| 1896 | 1896-05-09 | 1896-09-12 |
| 1897 | 1897-06-23 | 1897-09-10 |
| 1898 | 1898-06-08 | 1898-09-06 |
| 1899 | 1899-04-29 | 1899-08-31 |
| 1900 | 1900-05-15 | 1900-09-03 |
| 1901 | 1901-05-22 | 1901-09-07 |
| 1902 | 1902-05-22 | 1902-09-01 |
| 1903 | 1903-05-11 | 1903-09-15 |
| 1904 | 1904-06-05 | 1904-08-04 |
| 1905 | 1905-06-14 | 1905-08-21 |
| 1906 | 1906-05-16 | 1906-09-09 |
| 1907 | 1907-06-13 | 1907-08-20 |
| 1908 | 1908-05-26 | 1908-08-13 |
| 1909 | 1909-06-21 | 1909-08-25 |
| 1910 | 1910-05-24 | 1910-07-27 |
| 1911 | 1911-05-11 | 1911-08-10 |
| 1912 | 1912-06-02 | 1912-07-15 |
| 1913 | 1913-05-03 | 1913-09-03 |
| 1914 | 1914-05-26 | 1914-09-23 |
| 1915 | 1915-07-04 | 1915-09-16 |
| 1916 | 1916-07-06 | 1916-08-23 |
| 1917 | 1917-06-13 | 1917-08-02 |
| 1918 | 1918-05-17 | 1918-08-24 |
| 1919 | 1919-06-02 | 1919-09-08 |
| 1920 | 1920-06-01 | 1920-08-17 |
| 1921 | 1921-05-21 | 1921-09-03 |
| 1922 | 1922-06-08 | 1922-07-16 |
| 1923 | 1923-06-05 | 1923-08-04 |
| 1924 | 1924-07-12 | 1924-08-31 |
| 1925 | 1925-06-03 | 1925-07-07 |
| 1926 | 1926-07-21 | 1926-07-22 |
| 1927 | 1927-06-10 | 1927-07-13 |
| 1928 | 1928-07-08 | 1928-08-17 |
| 1929 | 1929-05-28 | 1929-09-03 |
| 1930 | 1930-05-06 | 1930-07-24 |
| 1931 | 1931-05-19 | 1931-09-11 |
| 1932 | 1932-05-16 | 1932-08-26 |
| 1933 | 1933-06-05 | 1933-08-01 |
| 1934 | 1934-06-02 | 1934-08-10 |
| 1935 | 1935-06-02 | 1935-08-18 |
| 1936 | 1936-05-02 | 1936-08-16 |
| 1937 | 1937-05-30 | 1937-09-03 |
| 1938 | 1938-04-28 | 1938-08-16 |
| 1939 | 1939-06-09 | 1939-09-17 |
| 1940 | 1940-05-27 | 1940-08-18 |
| 1941 | 1941-04-20 | 1941-08-08 |
| 1942 | 1942-05-03 | 1942-09-02 |
| 1943 | 1943-05-17 | 1943-08-02 |
| 1944 | 1944-05-04 | 1944-09-03 |
| 1945 | 1945-04-13 | 1945-09-08 |
| 1946 | 1946-05-25 | 1946-08-09 |
| 1947 | 1947-06-28 | 1947-09-12 |
| 1949 | 1949-05-05 | 1949-08-28 |
| 1950 | 1950-06-07 | 1950-10-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 60 | 40 | 1900 | 30 |
| 35 C (95 F): Days | 35 | 7 | 1911 | 2 |
| 90 F (32.2 C): Days | 57 | 22 | 1895 | 10 |
| 100 F (37.8 C): Days | 4 | 2 | 1911 | 2 |
| 0 C (32 F): Ice days (max | 60 | 94 | 1904 | 42 |
| 0 C (32 F): Frost days (min | 59 | 207 | 1940 | 172 |
| -10 C (14 F): Days with min | 59 | 99 | 1893 | 54 |
| -20 C (-4 F): Days with min | 59 | 29 | 1888 | 13 |
| -30 C (-22 F): Days with min | 22 | 4 | 1898 | 1 |
| 20 C (68 F): Tropical nights (min | 37 | 10 | 1921 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 54 | 43 | 1907 | 40 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 54 | 20 | 1888 | 9 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 38 | 4 | 1896 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1905 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 5 | 9 | 1933 | 8 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 2 | 1933 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1933 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1888.
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).