Seymour 1 NNW Threshold Days by Year (USC00237674)
19 fixed thresholds counted per year at Seymour 1 NNW (USC00237674): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Seymour 1 NNW Thresholds
- Seymour 1 NNW: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 1953 with 113.
- Seymour 1 NNW: days with a maximum temperature at or below 0 C (32 F) in 41 years, most in 1905 with 38.
- Seymour 1 NNW: days with a maximum temperature at or above 90 F (32.2 C) in 40 years, most in 1954 with 84.
- Seymour 1 NNW: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1927 with 54.
- 19 fixed thresholds have at least one qualifying day at Seymour 1 NNW.
Days at or above 30 C (86 F)
41 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1897 | 80 | 62 |
| 1898 | 41 | 62 |
| 1899 | 65 | 62 |
| 1900 | 59 | 47.6 |
| 1901 | 99 | 47.6 |
| 1902 | 38 | 47.6 |
| 1903 | 30 | 47.6 |
| 1904 | 36 | 47.6 |
| 1905 | 38 | 47.6 |
| 1906 | 33 | 47.6 |
| 1921 | 75 | 60.1 |
| 1922 | 77 | 60.1 |
| 1923 | 54 | 60.1 |
| 1924 | 42 | 60.1 |
| 1925 | 73 | 60.1 |
| 1926 | 69 | 60.1 |
| 1927 | 36 | 60.1 |
| 1928 | 51 | 60.1 |
| 1929 | 64 | 60.1 |
| 1930 | 54 | 72.3 |
| 1931 | 69 | 72.3 |
| 1933 | 72 | 72.3 |
| 1934 | 76 | 72.3 |
| 1935 | 53 | 72.3 |
| 1936 | 99 | 72.3 |
| 1937 | 68 | 72.3 |
| 1938 | 80 | 72.3 |
| 1939 | 80 | 72.3 |
| 1940 | 51 | 59.9 |
| 1941 | 65 | 59.9 |
| 1942 | 61 | 59.9 |
| 1943 | 70 | 59.9 |
| 1944 | 70 | 59.9 |
| 1945 | 47 | 59.9 |
| 1946 | 51 | 59.9 |
| 1947 | 64 | 59.9 |
| 1950 | 11 | 71.6 |
| 1951 | 43 | 71.6 |
| 1952 | 86 | 71.6 |
| 1953 | 113 | 71.6 |
| 1954 | 105 | 71.6 |
| Year | First date | Last date |
|---|---|---|
| 1897 | 1897-05-27 | 1897-10-16 |
| 1898 | 1898-06-02 | 1898-09-27 |
| 1899 | 1899-04-28 | 1899-10-13 |
| 1900 | 1900-05-05 | 1900-09-26 |
| 1901 | 1901-04-29 | 1901-10-01 |
| 1902 | 1902-04-20 | 1902-08-26 |
| 1903 | 1903-04-02 | 1903-09-09 |
| 1904 | 1904-06-18 | 1904-09-29 |
| 1905 | 1905-04-09 | 1905-09-16 |
| 1906 | 1906-04-07 | 1906-09-24 |
| 1921 | 1921-05-23 | 1921-09-28 |
| 1922 | 1922-06-09 | 1922-10-06 |
| 1923 | 1923-05-31 | 1923-09-28 |
| 1924 | 1924-06-08 | 1924-09-07 |
| 1925 | 1925-05-22 | 1925-09-20 |
| 1926 | 1926-05-24 | 1926-09-24 |
| 1927 | 1927-05-18 | 1927-09-17 |
| 1928 | 1928-05-10 | 1928-10-12 |
| 1929 | 1929-03-23 | 1929-09-29 |
| 1930 | 1930-06-21 | 1930-09-13 |
| 1931 | 1931-05-16 | 1931-10-10 |
| 1933 | 1933-06-04 | 1933-09-22 |
| 1934 | 1934-05-07 | 1934-08-19 |
| 1935 | 1935-07-01 | 1935-09-24 |
| 1936 | 1936-04-14 | 1936-09-21 |
| 1937 | 1937-05-31 | 1937-10-30 |
| 1938 | 1938-06-15 | 1938-10-14 |
| 1939 | 1939-05-24 | 1939-10-23 |
| 1940 | 1940-04-01 | 1940-10-05 |
| 1941 | 1941-06-09 | 1941-09-08 |
| 1942 | 1942-05-27 | 1942-09-18 |
| 1943 | 1943-05-05 | 1943-09-06 |
| 1944 | 1944-06-01 | 1944-09-20 |
| 1945 | 1945-06-28 | 1945-09-23 |
| 1946 | 1946-04-02 | 1946-09-26 |
| 1947 | 1947-06-08 | 1947-10-15 |
| 1950 | 1950-06-12 | 1950-09-20 |
| 1951 | 1951-05-31 | 1951-10-04 |
| 1952 | 1952-04-30 | 1952-10-12 |
| 1953 | 1953-04-22 | 1953-10-03 |
| 1954 | 1954-04-05 | 1954-10-03 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 41 | 113 | 1953 | 105 |
| 35 C (95 F): Days | 32 | 51 | 1954 | 51 |
| 40 C (104 F): Days | 5 | 13 | 1954 | 13 |
| 90 F (32.2 C): Days | 40 | 84 | 1954 | 84 |
| 100 F (37.8 C): Days | 16 | 25 | 1934 | 22 |
| 110 F (43.3 C): Days | 1 | 1 | 1954 | 1 |
| 0 C (32 F): Ice days (max | 41 | 38 | 1905 | 10 |
| 0 C (32 F): Frost days (min | 38 | 130 | 1951 | 130 |
| -10 C (14 F): Days with min | 38 | 37 | 1899 | 31 |
| -20 C (-4 F): Days with min | 22 | 9 | 1905 | 2 |
| -30 C (-22 F): Days with min | 3 | 1 | 1899 | 1 |
| 20 C (68 F): Tropical nights (min | 38 | 71 | 1921 | 19 |
| 25 C (77 F): Days with min | 10 | 11 | 1921 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 39 | 54 | 1927 | 25 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 39 | 23 | 1927 | 9 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 36 | 7 | 1941 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 7 | 1 | 1897 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 15 | 4 | 1939 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 1926 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1897.
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).