Alstead Center Threshold Days by Year (USC00270090)
13 fixed thresholds counted per year at Alstead Center (USC00270090): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Alstead Center Thresholds
- Alstead Center: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1902 with 50.
- Alstead Center: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1898 with 20.
- Alstead Center: nights with a minimum temperature at or below 0 C (32 F) in 20 years, most in 1904 with 184.
- Alstead Center: nights with a minimum temperature at or below -10 C (14 F) in 20 years, most in 1904 with 85.
- 13 fixed thresholds have at least one qualifying day at Alstead Center.
Days at or above 30 C (86 F)
19 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1902 | 2 | 3.9 |
| 1903 | 3 | 3.9 |
| 1904 | 3 | 3.9 |
| 1906 | 2 | 3.9 |
| 1907 | 5 | 3.9 |
| 1908 | 7 | 3.9 |
| 1909 | 5 | 3.9 |
| 1910 | 4 | 9.1 |
| 1911 | 17 | 9.1 |
| 1912 | 8 | 9.1 |
| 1913 | 13 | 9.1 |
| 1914 | 9 | 9.1 |
| 1915 | 1 | 9.1 |
| 1916 | 9 | 9.1 |
| 1917 | 7 | 9.1 |
| 1918 | 15 | 9.1 |
| 1919 | 8 | 9.1 |
| 1920 | 1 | 7.5 |
| 1921 | 14 | 7.5 |
| Year | First date | Last date |
|---|---|---|
| 1902 | 1902-07-08 | 1902-07-14 |
| 1903 | 1903-07-08 | 1903-07-10 |
| 1904 | 1904-06-26 | 1904-07-19 |
| 1906 | 1906-08-18 | 1906-08-19 |
| 1907 | 1907-06-18 | 1907-08-12 |
| 1908 | 1908-07-06 | 1908-07-31 |
| 1909 | 1909-06-22 | 1909-08-08 |
| 1910 | 1910-07-06 | 1910-07-24 |
| 1911 | 1911-05-11 | 1911-08-10 |
| 1912 | 1912-07-03 | 1912-07-10 |
| 1913 | 1913-06-16 | 1913-08-18 |
| 1914 | 1914-05-25 | 1914-09-22 |
| 1915 | 1915-09-15 | 1915-09-15 |
| 1916 | 1916-07-12 | 1916-08-22 |
| 1917 | 1917-07-22 | 1917-08-02 |
| 1918 | 1918-05-13 | 1918-08-23 |
| 1919 | 1919-06-03 | 1919-07-06 |
| 1920 | 1920-08-09 | 1920-08-09 |
| 1921 | 1921-05-21 | 1921-07-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 19 | 17 | 1911 | 14 |
| 35 C (95 F): Days | 3 | 4 | 1911 | 1 |
| 90 F (32.2 C): Days | 13 | 8 | 1911 | 4 |
| 0 C (32 F): Ice days (max | 19 | 90 | 1904 | 63 |
| 0 C (32 F): Frost days (min | 20 | 184 | 1904 | 129 |
| -10 C (14 F): Days with min | 20 | 85 | 1904 | 39 |
| -20 C (-4 F): Days with min | 20 | 19 | 1904 | 8 |
| -30 C (-22 F): Days with min | 4 | 3 | 1914 | 2 |
| 20 C (68 F): Tropical nights (min | 17 | 15 | 1916 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 25 | 50 | 1902 | 30 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 25 | 20 | 1898 | 6 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 18 | 5 | 1897 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1915 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1902.
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).