Keyport Threshold Days by Year (USC00454187)
12 fixed thresholds counted per year at Keyport (USC00454187): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Keyport Thresholds
- Keyport: days with a maximum temperature at or above 30 C (86 F) in 22 years, most in 1927 with 12.
- Keyport: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1916 with 131.
- Keyport: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1950 with 41.
- Keyport: days with a maximum temperature at or above 90 F (32.2 C) in 17 years, most in 1941 with 5.
- 12 fixed thresholds have at least one qualifying day at Keyport.
Days at or above 30 C (86 F)
22 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1916 | 6 | 8 |
| 1917 | 10 | 8 |
| 1922 | 8 | 7 |
| 1923 | 8 | 7 |
| 1925 | 4 | 7 |
| 1926 | 8 | 7 |
| 1927 | 12 | 7 |
| 1928 | 7 | 7 |
| 1929 | 2 | 7 |
| 1930 | 5 | 4.9 |
| 1931 | 4 | 4.9 |
| 1932 | 7 | 4.9 |
| 1933 | 4 | 4.9 |
| 1934 | 5 | 4.9 |
| 1935 | 10 | 4.9 |
| 1936 | 2 | 4.9 |
| 1937 | 1 | 4.9 |
| 1938 | 6 | 4.9 |
| 1939 | 5 | 4.9 |
| 1940 | 3 | 4.3 |
| 1941 | 5 | 4.3 |
| 1943 | 5 | 4.3 |
| Year | First date | Last date |
|---|---|---|
| 1916 | 1916-08-11 | 1916-08-26 |
| 1917 | 1917-06-13 | 1917-08-27 |
| 1922 | 1922-05-31 | 1922-08-25 |
| 1923 | 1923-06-05 | 1923-08-16 |
| 1925 | 1925-06-25 | 1925-08-10 |
| 1926 | 1926-05-13 | 1926-07-13 |
| 1927 | 1927-06-21 | 1927-08-18 |
| 1928 | 1928-07-21 | 1928-07-27 |
| 1929 | 1929-07-13 | 1929-08-10 |
| 1930 | 1930-06-15 | 1930-08-13 |
| 1931 | 1931-07-07 | 1931-08-09 |
| 1932 | 1932-06-10 | 1932-10-04 |
| 1933 | 1933-08-15 | 1933-08-26 |
| 1934 | 1934-08-20 | 1934-08-26 |
| 1935 | 1935-06-06 | 1935-08-28 |
| 1936 | 1936-08-20 | 1936-08-28 |
| 1937 | 1937-06-27 | 1937-06-27 |
| 1938 | 1938-07-14 | 1938-09-14 |
| 1939 | 1939-07-22 | 1939-08-09 |
| 1940 | 1940-06-11 | 1940-08-18 |
| 1941 | 1941-07-14 | 1941-07-18 |
| 1943 | 1943-07-20 | 1943-08-12 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 22 | 12 | 1927 | 5 |
| 35 C (95 F): Days | 4 | 2 | 1931 | 1 |
| 90 F (32.2 C): Days | 17 | 5 | 1941 | 5 |
| 0 C (32 F): Ice days (max | 14 | 12 | 1916 | 2 |
| 0 C (32 F): Frost days (min | 20 | 131 | 1916 | 9 |
| -10 C (14 F): Days with min | 7 | 7 | 1916 | 1 |
| 20 C (68 F): Tropical nights (min | 4 | 4 | 1923 | 2 |
| 25 C (77 F): Days with min | 1 | 1 | 1938 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 18 | 41 | 1950 | 38 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 17 | 12 | 1950 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 5 | 2 | 1933 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 4 | 2 | 1955 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.
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).