Humboldt Threshold Days by Year
15 fixed thresholds counted per year at Humboldt (CA004013400): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Humboldt Thresholds
- Humboldt: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1935 with 15.
- Humboldt: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 1961 with 27.
- Humboldt: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1972 with 150.
- Humboldt: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1916 with 258.
- 15 fixed thresholds have at least one qualifying day at Humboldt.
Days at or above 30 C (86 F)
25 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1914 | 9 | 5 |
| 1915 | 5 | 5 |
| 1916 | 1 | 5 |
| 1921 | 8 | 8 |
| 1934 | 10 | 8 |
| 1935 | 6 | 8 |
| 1955 | 11 | 8.8 |
| 1956 | 7 | 8.8 |
| 1957 | 7 | 8.8 |
| 1958 | 10 | 8.8 |
| 1959 | 9 | 8.8 |
| 1960 | 17 | 10.8 |
| 1961 | 27 | 10.8 |
| 1962 | 6 | 10.8 |
| 1963 | 8 | 10.8 |
| 1964 | 6 | 10.8 |
| 1965 | 7 | 10.8 |
| 1966 | 10 | 10.8 |
| 1967 | 15 | 10.8 |
| 1968 | 3 | 10.8 |
| 1969 | 9 | 10.8 |
| 1970 | 14 | 8.8 |
| 1971 | 8 | 8.8 |
| 1972 | 9 | 8.8 |
| 1973 | 4 | 8.8 |
| Year | First date | Last date |
|---|---|---|
| 1914 | 1914-07-04 | 1914-08-03 |
| 1915 | 1915-08-05 | 1915-08-31 |
| 1916 | 1916-08-02 | 1916-08-02 |
| 1921 | 1921-06-28 | 1921-09-01 |
| 1934 | 1934-05-27 | 1934-08-16 |
| 1935 | 1935-06-22 | 1935-08-23 |
| 1955 | 1955-07-14 | 1955-09-02 |
| 1956 | 1956-06-01 | 1956-08-13 |
| 1957 | 1957-07-09 | 1957-07-26 |
| 1958 | 1958-05-12 | 1958-08-17 |
| 1959 | 1959-06-14 | 1959-08-06 |
| 1960 | 1960-05-12 | 1960-09-04 |
| 1961 | 1961-06-03 | 1961-08-31 |
| 1962 | 1962-06-25 | 1962-08-13 |
| 1963 | 1963-07-05 | 1963-08-19 |
| 1964 | 1964-05-20 | 1964-07-22 |
| 1965 | 1965-06-10 | 1965-08-11 |
| 1966 | 1966-07-07 | 1966-09-18 |
| 1967 | 1967-06-27 | 1967-09-06 |
| 1968 | 1968-06-19 | 1968-09-11 |
| 1969 | 1969-05-26 | 1969-09-13 |
| 1970 | 1970-06-03 | 1970-08-13 |
| 1971 | 1971-05-13 | 1971-09-11 |
| 1972 | 1972-05-31 | 1972-08-29 |
| 1973 | 1973-06-23 | 1973-08-16 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 25 | 27 | 1961 | 4 |
| 35 C (95 F): Days | 9 | 2 | 1961 | 1 |
| 90 F (32.2 C): Days | 22 | 16 | 1961 | 1 |
| 0 C (32 F): Ice days (max | 25 | 150 | 1972 | 132 |
| 0 C (32 F): Frost days (min | 25 | 258 | 1916 | 209 |
| -10 C (14 F): Days with min | 25 | 149 | 1935 | 109 |
| -20 C (-4 F): Days with min | 25 | 95 | 1955 | 41 |
| -30 C (-22 F): Days with min | 25 | 52 | 1916 | 13 |
| -40 C (-40 F): Days with min | 11 | 8 | 1916 | 4 |
| 20 C (68 F): Tropical nights (min | 5 | 1 | 1935 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 26 | 15 | 1935 | 9 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 22 | 4 | 1966 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 9 | 1 | 1915 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 23 | 5 | 1921 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 1962 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-16).