San Diego Wbo Threshold Days by Year (USC00047738)
12 fixed thresholds counted per year at San Diego Wbo (USC00047738): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for San Diego Wbo Thresholds
- San Diego Wbo: days with 10 mm (0.39 in) or more of precipitation in 81 years, most in 1884 with 24.
- San Diego Wbo: days with 25 mm (0.98 in) or more of precipitation in 64 years, most in 1884 with 7.
- San Diego Wbo: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 1939 with 16.
- San Diego Wbo: nights with a minimum temperature at or above 20 C (68 F) in 49 years, most in 1931 with 62.
- 12 fixed thresholds have at least one qualifying day at San Diego Wbo.
Days at or above 30 C (86 F)
55 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1875 | 3 | 6 |
| 1876 | 1 | 6 |
| 1877 | 6 | 6 |
| 1878 | 5 | 6 |
| 1879 | 15 | 6 |
| 1881 | 1 | 3.3 |
| 1883 | 5 | 3.3 |
| 1884 | 3 | 3.3 |
| 1885 | 4 | 3.3 |
| 1888 | 1 | 3.3 |
| 1889 | 6 | 3.3 |
| 1890 | 9 | 4.2 |
| 1891 | 4 | 4.2 |
| 1892 | 1 | 4.2 |
| 1893 | 3 | 4.2 |
| 1894 | 3 | 4.2 |
| 1895 | 4 | 4.2 |
| 1896 | 5 | 4.2 |
| 1897 | 2 | 4.2 |
| 1898 | 6 | 4.2 |
| 1899 | 5 | 4.2 |
| 1900 | 4 | 4.7 |
| 1901 | 3 | 4.7 |
| 1904 | 6 | 4.7 |
| 1905 | 1 | 4.7 |
| 1906 | 8 | 4.7 |
| 1907 | 1 | 4.7 |
| 1909 | 10 | 4.7 |
| 1910 | 4 | 3.9 |
| 1911 | 3 | 3.9 |
| 1912 | 6 | 3.9 |
| 1913 | 4 | 3.9 |
| 1914 | 5 | 3.9 |
| 1915 | 3 | 3.9 |
| 1917 | 3 | 3.9 |
| 1918 | 6 | 3.9 |
| 1919 | 1 | 3.9 |
| 1921 | 5 | 3.4 |
| 1922 | 4 | 3.4 |
| 1923 | 1 | 3.4 |
| 1924 | 2 | 3.4 |
| 1925 | 2 | 3.4 |
| 1926 | 5 | 3.4 |
| 1927 | 3 | 3.4 |
| 1929 | 5 | 3.4 |
| 1930 | 8 | 4.3 |
| 1931 | 10 | 4.3 |
| 1932 | 1 | 4.3 |
| 1933 | 1 | 4.3 |
| 1934 | 3 | 4.3 |
| 1935 | 1 | 4.3 |
| 1936 | 1 | 4.3 |
| 1937 | 1 | 4.3 |
| 1938 | 1 | 4.3 |
| 1939 | 16 | 4.3 |
| Year | First date | Last date |
|---|---|---|
| 1875 | 1875-09-15 | 1875-10-16 |
| 1876 | 1876-04-28 | 1876-04-28 |
| 1877 | 1877-06-09 | 1877-09-01 |
| 1878 | 1878-09-10 | 1878-10-22 |
| 1879 | 1879-03-28 | 1879-10-28 |
| 1881 | 1881-09-13 | 1881-09-13 |
| 1883 | 1883-05-20 | 1883-09-24 |
| 1884 | 1884-08-06 | 1884-10-22 |
| 1885 | 1885-08-18 | 1885-10-03 |
| 1888 | 1888-04-12 | 1888-04-12 |
| 1889 | 1889-08-14 | 1889-09-28 |
| 1890 | 1890-06-06 | 1890-11-04 |
| 1891 | 1891-07-25 | 1891-09-08 |
| 1892 | 1892-05-18 | 1892-05-18 |
| 1893 | 1893-05-22 | 1893-10-12 |
| 1894 | 1894-08-27 | 1894-10-03 |
| 1895 | 1895-09-22 | 1895-09-28 |
| 1896 | 1896-05-24 | 1896-08-29 |
| 1897 | 1897-04-09 | 1897-08-20 |
| 1898 | 1898-04-13 | 1898-09-12 |
| 1899 | 1899-03-05 | 1899-10-08 |
| 1900 | 1900-06-07 | 1900-11-03 |
| 1901 | 1901-06-28 | 1901-10-22 |
| 1904 | 1904-09-04 | 1904-11-10 |
| 1905 | 1905-08-30 | 1905-08-30 |
| 1906 | 1906-04-20 | 1906-11-14 |
| 1907 | 1907-11-29 | 1907-11-29 |
| 1909 | 1909-05-31 | 1909-10-24 |
| 1910 | 1910-04-22 | 1910-10-24 |
| 1911 | 1911-06-06 | 1911-07-31 |
| 1912 | 1912-09-19 | 1912-11-16 |
| 1913 | 1913-09-11 | 1913-10-19 |
| 1914 | 1914-03-07 | 1914-11-20 |
| 1915 | 1915-08-26 | 1915-08-30 |
| 1917 | 1917-06-14 | 1917-09-28 |
| 1918 | 1918-09-11 | 1918-10-31 |
| 1919 | 1919-06-03 | 1919-06-03 |
| 1921 | 1921-02-24 | 1921-11-03 |
| 1922 | 1922-09-17 | 1922-10-24 |
| 1923 | 1923-10-13 | 1923-10-13 |
| 1924 | 1924-09-29 | 1924-11-23 |
| 1925 | 1925-07-14 | 1925-07-15 |
| 1926 | 1926-02-26 | 1926-11-08 |
| 1927 | 1927-05-13 | 1927-10-20 |
| 1929 | 1929-05-02 | 1929-11-02 |
| 1930 | 1930-07-14 | 1930-11-01 |
| 1931 | 1931-03-21 | 1931-10-30 |
| 1932 | 1932-11-24 | 1932-11-24 |
| 1933 | 1933-11-13 | 1933-11-13 |
| 1934 | 1934-09-17 | 1934-09-19 |
| 1935 | 1935-08-09 | 1935-08-09 |
| 1936 | 1936-08-08 | 1936-08-08 |
| 1937 | 1937-09-12 | 1937-09-12 |
| 1938 | 1938-09-26 | 1938-09-26 |
| 1939 | 1939-04-06 | 1939-11-22 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 55 | 16 | 1939 | 16 |
| 35 C (95 F): Days | 12 | 5 | 1939 | 5 |
| 40 C (104 F): Days | 2 | 1 | 1913 | 1 |
| 90 F (32.2 C): Days | 38 | 10 | 1879 | 8 |
| 100 F (37.8 C): Days | 6 | 2 | 1939 | 2 |
| 110 F (43.3 C): Days | 1 | 1 | 1913 | 1 |
| 0 C (32 F): Frost days (min | 7 | 2 | 1913 | 1 |
| 20 C (68 F): Tropical nights (min | 49 | 62 | 1931 | 9 |
| 25 C (77 F): Days with min | 1 | 2 | 1939 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 81 | 24 | 1884 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 64 | 7 | 1884 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 14 | 2 | 1854 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1875.
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).