Humboldt Threshold Days by Year (USC00203991)
17 fixed thresholds counted per year at Humboldt (USC00203991): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Humboldt Thresholds
- Humboldt: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 1921 with 36.
- Humboldt: days with a maximum temperature at or below 0 C (32 F) in 27 years, most in 1901 with 120.
- Humboldt: days with 10 mm (0.39 in) or more of precipitation in 27 years, most in 1916 with 37.
- Humboldt: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1906 with 11.
- 17 fixed thresholds have at least one qualifying day at Humboldt.
Days at or above 30 C (86 F)
27 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1897 | 15 | 10.3 |
| 1898 | 13 | 10.3 |
| 1899 | 3 | 10.3 |
| 1900 | 13 | 6.5 |
| 1901 | 12 | 6.5 |
| 1902 | 2 | 6.5 |
| 1905 | 1 | 6.5 |
| 1906 | 8 | 6.5 |
| 1907 | 3 | 6.5 |
| 1911 | 22 | 16.6 |
| 1912 | 13 | 16.6 |
| 1913 | 23 | 16.6 |
| 1914 | 19 | 16.6 |
| 1915 | 2 | 16.6 |
| 1916 | 20 | 16.6 |
| 1917 | 13 | 16.6 |
| 1918 | 10 | 16.6 |
| 1919 | 27 | 16.6 |
| 1920 | 7 | 12.9 |
| 1921 | 36 | 12.9 |
| 1922 | 11 | 12.9 |
| 1923 | 18 | 12.9 |
| 1924 | 2 | 12.9 |
| 1925 | 16 | 12.9 |
| 1926 | 9 | 12.9 |
| 1927 | 7 | 12.9 |
| 1928 | 10 | 12.9 |
| Year | First date | Last date |
|---|---|---|
| 1897 | 1897-06-14 | 1897-09-09 |
| 1898 | 1898-06-04 | 1898-09-03 |
| 1899 | 1899-06-05 | 1899-08-29 |
| 1900 | 1900-05-13 | 1900-08-21 |
| 1901 | 1901-06-10 | 1901-08-17 |
| 1902 | 1902-07-04 | 1902-07-07 |
| 1905 | 1905-06-18 | 1905-06-18 |
| 1906 | 1906-05-17 | 1906-09-10 |
| 1907 | 1907-06-15 | 1907-06-17 |
| 1911 | 1911-05-19 | 1911-07-10 |
| 1912 | 1912-06-24 | 1912-09-06 |
| 1913 | 1913-06-13 | 1913-09-07 |
| 1914 | 1914-05-25 | 1914-09-20 |
| 1915 | 1915-04-26 | 1915-07-13 |
| 1916 | 1916-07-02 | 1916-07-30 |
| 1917 | 1917-07-09 | 1917-08-01 |
| 1918 | 1918-05-05 | 1918-08-26 |
| 1919 | 1919-05-27 | 1919-09-08 |
| 1920 | 1920-06-10 | 1920-06-28 |
| 1921 | 1921-05-20 | 1921-09-02 |
| 1922 | 1922-06-07 | 1922-09-05 |
| 1923 | 1923-05-28 | 1923-07-31 |
| 1924 | 1924-08-29 | 1924-08-30 |
| 1925 | 1925-05-30 | 1925-09-03 |
| 1926 | 1926-06-28 | 1926-08-28 |
| 1927 | 1927-06-28 | 1927-09-15 |
| 1928 | 1928-06-30 | 1928-08-19 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 27 | 36 | 1921 | 10 |
| 35 C (95 F): Days | 8 | 7 | 1901 | 1 |
| 90 F (32.2 C): Days | 22 | 22 | 1921 | 1 |
| 100 F (37.8 C): Days | 3 | 1 | 1911 | 1 |
| 0 C (32 F): Ice days (max | 27 | 120 | 1901 | 83 |
| 0 C (32 F): Frost days (min | 25 | 242 | 1917 | 208 |
| -10 C (14 F): Days with min | 25 | 118 | 1901 | 103 |
| -20 C (-4 F): Days with min | 25 | 59 | 1912 | 37 |
| -30 C (-22 F): Days with min | 25 | 28 | 1917 | 8 |
| -40 C (-40 F): Days with min | 13 | 5 | 1899 | 1 |
| 20 C (68 F): Tropical nights (min | 8 | 6 | 1911 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 27 | 37 | 1916 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 26 | 11 | 1906 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 16 | 3 | 1911 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1923 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 25 | 11 | 1906 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 9 | 3 | 1906 | 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).