Plum Island Threshold Days by Year (USC00476667)
18 fixed thresholds counted per year at Plum Island (USC00476667): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Plum Island Thresholds
- Plum Island: days with a maximum temperature at or below 0 C (32 F) in 31 years, most in 1936 with 102.
- Plum Island: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 1935 with 189.
- Plum Island: nights with a minimum temperature at or below -10 C (14 F) in 31 years, most in 1917 with 78.
- Plum Island: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1911 with 38.
- 18 fixed thresholds have at least one qualifying day at Plum Island.
Days at or above 30 C (86 F)
26 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1909 | 2 | 2 |
| 1910 | 10 | 5.2 |
| 1911 | 5 | 5.2 |
| 1912 | 4 | 5.2 |
| 1914 | 4 | 5.2 |
| 1915 | 1 | 5.2 |
| 1916 | 13 | 5.2 |
| 1917 | 4 | 5.2 |
| 1918 | 1 | 5.2 |
| 1919 | 5 | 5.2 |
| 1920 | 1 | 5.4 |
| 1921 | 21 | 5.4 |
| 1922 | 1 | 5.4 |
| 1923 | 3 | 5.4 |
| 1925 | 1 | 5.4 |
| 1928 | 3 | 5.4 |
| 1929 | 8 | 5.4 |
| 1930 | 10 | 9 |
| 1931 | 20 | 9 |
| 1932 | 9 | 9 |
| 1933 | 8 | 9 |
| 1934 | 6 | 9 |
| 1936 | 6 | 9 |
| 1938 | 1 | 9 |
| 1939 | 12 | 9 |
| 1941 | 11 | 11 |
| Year | First date | Last date |
|---|---|---|
| 1909 | 1909-06-30 | 1909-07-29 |
| 1910 | 1910-06-17 | 1910-07-20 |
| 1911 | 1911-06-19 | 1911-08-13 |
| 1912 | 1912-06-25 | 1912-09-06 |
| 1914 | 1914-06-09 | 1914-07-29 |
| 1915 | 1915-08-22 | 1915-08-22 |
| 1916 | 1916-07-07 | 1916-08-22 |
| 1917 | 1917-07-26 | 1917-07-31 |
| 1918 | 1918-08-25 | 1918-08-25 |
| 1919 | 1919-07-17 | 1919-09-08 |
| 1920 | 1920-07-03 | 1920-07-03 |
| 1921 | 1921-05-22 | 1921-09-02 |
| 1922 | 1922-08-17 | 1922-08-17 |
| 1923 | 1923-06-24 | 1923-07-20 |
| 1925 | 1925-07-15 | 1925-07-15 |
| 1928 | 1928-07-18 | 1928-08-08 |
| 1929 | 1929-07-17 | 1929-08-31 |
| 1930 | 1930-06-20 | 1930-09-01 |
| 1931 | 1931-06-19 | 1931-09-13 |
| 1932 | 1932-07-09 | 1932-09-15 |
| 1933 | 1933-06-19 | 1933-08-16 |
| 1934 | 1934-06-28 | 1934-08-08 |
| 1936 | 1936-07-08 | 1936-07-14 |
| 1938 | 1938-08-28 | 1938-08-28 |
| 1939 | 1939-07-07 | 1939-09-14 |
| 1941 | 1941-06-21 | 1941-09-22 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 26 | 21 | 1921 | 11 |
| 35 C (95 F): Days | 8 | 7 | 1931 | 3 |
| 40 C (104 F): Days | 1 | 1 | 1931 | 1 |
| 90 F (32.2 C): Days | 16 | 14 | 1931 | 5 |
| 100 F (37.8 C): Days | 2 | 2 | 1931 | 2 |
| 0 C (32 F): Ice days (max | 31 | 102 | 1936 | 57 |
| 0 C (32 F): Frost days (min | 31 | 189 | 1935 | 136 |
| -10 C (14 F): Days with min | 31 | 78 | 1917 | 40 |
| -20 C (-4 F): Days with min | 28 | 29 | 1936 | 3 |
| -30 C (-22 F): Days with min | 5 | 3 | 1929 | 2 |
| 20 C (68 F): Tropical nights (min | 28 | 22 | 1937 | 5 |
| 25 C (77 F): Days with min | 4 | 2 | 1931 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 29 | 38 | 1911 | 18 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 26 | 12 | 1940 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 13 | 4 | 1921 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1910 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 11 | 8 | 1923 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 2 | 1922 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.
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).