Santa Ana River Ph 1 Threshold Days by Year (USC00047894)
15 fixed thresholds counted per year at Santa Ana River Ph 1 (USC00047894): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Santa Ana River Ph 1 Thresholds
- Santa Ana River Ph 1: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1941 with 38.
- Santa Ana River Ph 1: days with 25 mm (0.98 in) or more of precipitation in 50 years, most in 1936 with 17.
- Santa Ana River Ph 1: days with a maximum temperature at or above 30 C (86 F) in 46 years, most in 1906 with 132.
- Santa Ana River Ph 1: days with a maximum temperature at or above 35 C (95 F) in 46 years, most in 1906 with 61.
- 15 fixed thresholds have at least one qualifying day at Santa Ana River Ph 1.
Days at or above 30 C (86 F)
46 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1905 | 118 | 122.3 |
| 1906 | 132 | 122.3 |
| 1909 | 117 | 122.3 |
| 1913 | 67 | 80 |
| 1915 | 83 | 80 |
| 1917 | 101 | 80 |
| 1918 | 66 | 80 |
| 1919 | 83 | 80 |
| 1920 | 71 | 75.2 |
| 1921 | 70 | 75.2 |
| 1922 | 83 | 75.2 |
| 1923 | 50 | 75.2 |
| 1924 | 95 | 75.2 |
| 1925 | 60 | 75.2 |
| 1926 | 62 | 75.2 |
| 1927 | 83 | 75.2 |
| 1928 | 77 | 75.2 |
| 1929 | 101 | 75.2 |
| 1930 | 93 | 106.3 |
| 1931 | 97 | 106.3 |
| 1932 | 104 | 106.3 |
| 1933 | 118 | 106.3 |
| 1934 | 114 | 106.3 |
| 1935 | 99 | 106.3 |
| 1936 | 125 | 106.3 |
| 1937 | 119 | 106.3 |
| 1938 | 101 | 106.3 |
| 1939 | 93 | 106.3 |
| 1940 | 98 | 96.9 |
| 1941 | 67 | 96.9 |
| 1942 | 93 | 96.9 |
| 1943 | 108 | 96.9 |
| 1944 | 80 | 96.9 |
| 1945 | 98 | 96.9 |
| 1946 | 116 | 96.9 |
| 1947 | 100 | 96.9 |
| 1948 | 98 | 96.9 |
| 1949 | 111 | 96.9 |
| 1950 | 110 | 99.4 |
| 1951 | 99 | 99.4 |
| 1952 | 114 | 99.4 |
| 1953 | 89 | 99.4 |
| 1954 | 93 | 99.4 |
| 1955 | 96 | 99.4 |
| 1956 | 97 | 99.4 |
| 1957 | 97 | 99.4 |
| Year | First date | Last date |
|---|---|---|
| 1905 | 1905-04-04 | 1905-10-25 |
| 1906 | 1906-04-18 | 1906-11-14 |
| 1909 | 1909-04-01 | 1909-11-04 |
| 1913 | 1913-06-12 | 1913-10-26 |
| 1915 | 1915-05-27 | 1915-10-28 |
| 1917 | 1917-06-08 | 1917-11-02 |
| 1918 | 1918-05-02 | 1918-10-13 |
| 1919 | 1919-05-27 | 1919-09-25 |
| 1920 | 1920-05-16 | 1920-10-03 |
| 1921 | 1921-04-24 | 1921-10-20 |
| 1922 | 1922-05-23 | 1922-09-25 |
| 1923 | 1923-05-07 | 1923-09-09 |
| 1924 | 1924-05-07 | 1924-10-03 |
| 1925 | 1925-06-19 | 1925-09-24 |
| 1926 | 1926-05-31 | 1926-10-26 |
| 1927 | 1927-04-25 | 1927-10-19 |
| 1928 | 1928-04-29 | 1928-10-09 |
| 1929 | 1929-05-02 | 1929-10-22 |
| 1930 | 1930-03-25 | 1930-10-07 |
| 1931 | 1931-03-21 | 1931-10-02 |
| 1932 | 1932-04-10 | 1932-10-27 |
| 1933 | 1933-05-24 | 1933-11-14 |
| 1934 | 1934-03-30 | 1934-11-06 |
| 1935 | 1935-05-20 | 1935-10-09 |
| 1936 | 1936-04-11 | 1936-11-18 |
| 1937 | 1937-04-14 | 1937-11-05 |
| 1938 | 1938-04-17 | 1938-09-30 |
| 1939 | 1939-05-25 | 1939-10-30 |
| 1940 | 1940-04-12 | 1940-10-20 |
| 1941 | 1941-05-07 | 1941-10-10 |
| 1942 | 1942-05-19 | 1942-10-21 |
| 1943 | 1943-05-21 | 1943-10-17 |
| 1944 | 1944-06-04 | 1944-09-27 |
| 1945 | 1945-04-29 | 1945-10-04 |
| 1946 | 1946-04-22 | 1946-09-29 |
| 1947 | 1947-04-14 | 1947-10-19 |
| 1948 | 1948-04-16 | 1948-10-09 |
| 1949 | 1949-04-21 | 1949-11-05 |
| 1950 | 1950-04-19 | 1950-11-05 |
| 1951 | 1951-05-25 | 1951-10-18 |
| 1952 | 1952-05-18 | 1952-10-21 |
| 1953 | 1953-06-14 | 1953-10-31 |
| 1954 | 1954-04-16 | 1954-10-21 |
| 1955 | 1955-05-19 | 1955-10-29 |
| 1956 | 1956-05-16 | 1956-09-30 |
| 1957 | 1957-05-27 | 1957-09-29 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 46 | 132 | 1906 | 97 |
| 35 C (95 F): Days | 46 | 61 | 1906 | 40 |
| 40 C (104 F): Days | 21 | 11 | 1905 | 6 |
| 90 F (32.2 C): Days | 46 | 112 | 1906 | 78 |
| 100 F (37.8 C): Days | 36 | 26 | 1905 | 7 |
| 110 F (43.3 C): Days | 3 | 1 | 1905 | 1 |
| 0 C (32 F): Ice days (max | 1 | 1 | 1913 | 1 |
| 0 C (32 F): Frost days (min | 44 | 41 | 1909 | 6 |
| 20 C (68 F): Tropical nights (min | 45 | 56 | 1937 | 25 |
| 25 C (77 F): Days with min | 19 | 5 | 1933 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 50 | 38 | 1941 | 4 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 50 | 17 | 1936 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 35 | 5 | 1936 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 7 | 2 | 1956 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 3 | 2 | 1949 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.
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).