Ft Ross Threshold Days by Year (USC00043191)
9 fixed thresholds counted per year at Ft Ross (USC00043191): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ft Ross Thresholds
- Ft Ross: days with 10 mm (0.39 in) or more of precipitation in 108 years, most in 1983 with 61.
- Ft Ross: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1909 with 33.
- Ft Ross: days with 50 mm (1.97 in) or more of precipitation in 99 years, most in 1899 with 14.
- Ft Ross: nights with a minimum temperature at or below 0 C (32 F) in 37 years, most in 1985 with 32.
- 9 fixed thresholds have at least one qualifying day at Ft Ross.
Days at or above 30 C (86 F)
22 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1898 | 1 | 1 |
| 1900 | 1 | 1.8 |
| 1901 | 2 | 1.8 |
| 1902 | 1 | 1.8 |
| 1904 | 3 | 1.8 |
| 1951 | 2 | 1.7 |
| 1954 | 1 | 1.7 |
| 1958 | 2 | 1.7 |
| 1960 | 1 | 2.2 |
| 1961 | 4 | 2.2 |
| 1964 | 2 | 2.2 |
| 1965 | 3 | 2.2 |
| 1967 | 1 | 2.2 |
| 1970 | 2 | 2 |
| 1971 | 2 | 2 |
| 1976 | 2 | 2 |
| 1979 | 2 | 2 |
| 1980 | 1 | 1.3 |
| 1983 | 1 | 1.3 |
| 1984 | 2 | 1.3 |
| 1985 | 1 | 1.3 |
| 1992 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1898 | 1898-07-01 | 1898-07-01 |
| 1900 | 1900-09-21 | 1900-09-21 |
| 1901 | 1901-10-11 | 1901-10-12 |
| 1902 | 1902-09-29 | 1902-09-29 |
| 1904 | 1904-09-07 | 1904-09-09 |
| 1951 | 1951-09-15 | 1951-09-16 |
| 1954 | 1954-09-25 | 1954-09-25 |
| 1958 | 1958-09-26 | 1958-09-27 |
| 1960 | 1960-06-02 | 1960-06-02 |
| 1961 | 1961-09-02 | 1961-10-15 |
| 1964 | 1964-09-21 | 1964-09-22 |
| 1965 | 1965-10-22 | 1965-10-25 |
| 1967 | 1967-10-17 | 1967-10-17 |
| 1970 | 1970-09-22 | 1970-09-26 |
| 1971 | 1971-09-14 | 1971-09-15 |
| 1976 | 1976-06-24 | 1976-06-27 |
| 1979 | 1979-09-11 | 1979-09-12 |
| 1980 | 1980-10-02 | 1980-10-02 |
| 1983 | 1983-09-20 | 1983-09-20 |
| 1984 | 1984-09-08 | 1984-09-09 |
| 1985 | 1985-07-02 | 1985-07-02 |
| 1992 | 1992-09-27 | 1992-09-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 22 | 4 | 1961 | 1 |
| 90 F (32.2 C): Days | 4 | 2 | 1965 | 2 |
| 0 C (32 F): Frost days (min | 37 | 32 | 1985 | 2 |
| 20 C (68 F): Tropical nights (min | 1 | 2 | 1981 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 108 | 61 | 1983 | 16 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 108 | 33 | 1909 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 99 | 14 | 1899 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 37 | 4 | 1904 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1920 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.
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 (2026-10-12).