Rock 1 E Threshold Days by Year (USC00207068)
16 fixed thresholds counted per year at Rock 1 E (USC00207068): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rock 1 E Thresholds
- Rock 1 E: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1911 with 45.
- Rock 1 E: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1911 with 10.
- Rock 1 E: days with 10 cm (3.9 in) or more of snowfall in 40 years, most in 1910 with 11.
- Rock 1 E: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1922 with 2.
- 16 fixed thresholds have at least one qualifying day at Rock 1 E.
Days at or above 30 C (86 F)
19 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1906 | 9 | 8 |
| 1907 | 3 | 8 |
| 1908 | 13 | 8 |
| 1909 | 7 | 8 |
| 1910 | 18 | 12.4 |
| 1911 | 9 | 12.4 |
| 1912 | 10 | 12.4 |
| 1913 | 12 | 12.4 |
| 1914 | 14 | 12.4 |
| 1915 | 3 | 12.4 |
| 1916 | 17 | 12.4 |
| 1917 | 8 | 12.4 |
| 1918 | 5 | 12.4 |
| 1919 | 28 | 12.4 |
| 1920 | 6 | 14 |
| 1921 | 36 | 14 |
| 1922 | 13 | 14 |
| 1923 | 12 | 14 |
| 1924 | 3 | 14 |
| Year | First date | Last date |
|---|---|---|
| 1906 | 1906-05-17 | 1906-09-10 |
| 1907 | 1907-06-15 | 1907-08-06 |
| 1908 | 1908-06-20 | 1908-09-22 |
| 1909 | 1909-06-20 | 1909-08-24 |
| 1910 | 1910-06-14 | 1910-08-12 |
| 1911 | 1911-05-27 | 1911-08-15 |
| 1912 | 1912-06-25 | 1912-09-09 |
| 1913 | 1913-06-13 | 1913-09-07 |
| 1914 | 1914-06-07 | 1914-08-09 |
| 1915 | 1915-04-24 | 1915-09-04 |
| 1916 | 1916-07-04 | 1916-08-20 |
| 1917 | 1917-07-21 | 1917-07-31 |
| 1918 | 1918-07-19 | 1918-08-25 |
| 1919 | 1919-05-26 | 1919-09-08 |
| 1920 | 1920-06-09 | 1920-08-18 |
| 1921 | 1921-05-20 | 1921-09-09 |
| 1922 | 1922-05-11 | 1922-10-04 |
| 1923 | 1923-06-03 | 1923-07-20 |
| 1924 | 1924-07-06 | 1924-08-26 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 19 | 36 | 1921 | 3 |
| 35 C (95 F): Days | 5 | 3 | 1916 | 3 |
| 90 F (32.2 C): Days | 17 | 21 | 1921 | 1 |
| 100 F (37.8 C): Days | 1 | 1 | 1911 | 1 |
| 0 C (32 F): Ice days (max | 19 | 109 | 1917 | 94 |
| 0 C (32 F): Frost days (min | 19 | 222 | 1907 | 198 |
| -10 C (14 F): Days with min | 19 | 99 | 1912 | 98 |
| -20 C (-4 F): Days with min | 19 | 48 | 1912 | 31 |
| -30 C (-22 F): Days with min | 15 | 13 | 1912 | 1 |
| 20 C (68 F): Tropical nights (min | 12 | 5 | 1916 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 58 | 45 | 1911 | 17 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 57 | 10 | 1911 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 29 | 2 | 1922 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1914 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 40 | 11 | 1910 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 11 | 1 | 1959 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.
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).