San Pedro Threshold Days by Year
11 fixed thresholds counted per year at San Pedro (USC00047876): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for San Pedro Thresholds
- San Pedro: days with a maximum temperature at or above 30 C (86 F) in 42 years, most in 1931 with 18.
- San Pedro: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1940 with 19.
- San Pedro: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 1940 with 8.
- San Pedro: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 1939 with 8.
- 11 fixed thresholds have at least one qualifying day at San Pedro.
Days at or above 30 C (86 F)
42 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1919 | 1 | 1 |
| 1920 | 1 | 4 |
| 1921 | 7 | 4 |
| 1923 | 4 | 4 |
| 1924 | 3 | 4 |
| 1925 | 3 | 4 |
| 1926 | 6 | 4 |
| 1927 | 3 | 4 |
| 1929 | 5 | 4 |
| 1930 | 7 | 7.2 |
| 1931 | 18 | 7.2 |
| 1932 | 1 | 7.2 |
| 1933 | 5 | 7.2 |
| 1934 | 9 | 7.2 |
| 1935 | 2 | 7.2 |
| 1936 | 9 | 7.2 |
| 1937 | 1 | 7.2 |
| 1938 | 2 | 7.2 |
| 1939 | 18 | 7.2 |
| 1940 | 7 | 6.6 |
| 1941 | 5 | 6.6 |
| 1942 | 5 | 6.6 |
| 1943 | 7 | 6.6 |
| 1944 | 5 | 6.6 |
| 1946 | 10 | 6.6 |
| 1947 | 8 | 6.6 |
| 1948 | 5 | 6.6 |
| 1949 | 7 | 6.6 |
| 1950 | 6 | 6.9 |
| 1951 | 4 | 6.9 |
| 1952 | 2 | 6.9 |
| 1953 | 9 | 6.9 |
| 1954 | 4 | 6.9 |
| 1955 | 6 | 6.9 |
| 1956 | 11 | 6.9 |
| 1957 | 7 | 6.9 |
| 1958 | 11 | 6.9 |
| 1959 | 9 | 6.9 |
| 1960 | 8 | 7 |
| 1961 | 7 | 7 |
| 1962 | 5 | 7 |
| 1963 | 8 | 7 |
| Year | First date | Last date |
|---|---|---|
| 1919 | 1919-12-28 | 1919-12-28 |
| 1920 | 1920-07-18 | 1920-07-18 |
| 1921 | 1921-02-25 | 1921-11-17 |
| 1923 | 1923-01-10 | 1923-10-15 |
| 1924 | 1924-09-30 | 1924-11-29 |
| 1925 | 1925-07-15 | 1925-10-21 |
| 1926 | 1926-02-28 | 1926-10-07 |
| 1927 | 1927-05-14 | 1927-10-21 |
| 1929 | 1929-06-20 | 1929-10-22 |
| 1930 | 1930-03-25 | 1930-10-30 |
| 1931 | 1931-05-20 | 1931-10-30 |
| 1932 | 1932-02-27 | 1932-02-27 |
| 1933 | 1933-10-04 | 1933-11-24 |
| 1934 | 1934-03-09 | 1934-09-30 |
| 1935 | 1935-08-10 | 1935-08-11 |
| 1936 | 1936-06-20 | 1936-11-19 |
| 1937 | 1937-09-13 | 1937-09-13 |
| 1938 | 1938-09-22 | 1938-09-28 |
| 1939 | 1939-04-07 | 1939-10-31 |
| 1940 | 1940-04-13 | 1940-12-06 |
| 1941 | 1941-05-07 | 1941-10-17 |
| 1942 | 1942-07-05 | 1942-10-23 |
| 1943 | 1943-05-19 | 1943-09-23 |
| 1944 | 1944-05-05 | 1944-09-24 |
| 1946 | 1946-04-11 | 1946-10-24 |
| 1947 | 1947-04-12 | 1947-10-19 |
| 1948 | 1948-04-15 | 1948-10-07 |
| 1949 | 1949-08-27 | 1949-11-13 |
| 1950 | 1950-10-12 | 1950-11-22 |
| 1951 | 1951-07-19 | 1951-10-08 |
| 1952 | 1952-08-23 | 1952-09-05 |
| 1953 | 1953-02-06 | 1953-11-25 |
| 1954 | 1954-07-07 | 1954-11-20 |
| 1955 | 1955-09-02 | 1955-09-13 |
| 1956 | 1956-09-09 | 1956-11-10 |
| 1957 | 1957-06-16 | 1957-08-28 |
| 1958 | 1958-08-15 | 1958-10-18 |
| 1959 | 1959-04-01 | 1959-12-01 |
| 1960 | 1960-07-20 | 1960-10-06 |
| 1961 | 1961-09-03 | 1961-10-16 |
| 1962 | 1962-04-06 | 1962-10-30 |
| 1963 | 1963-09-08 | 1963-09-29 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 42 | 18 | 1931 | 8 |
| 35 C (95 F): Days | 12 | 4 | 1939 | 2 |
| 90 F (32.2 C): Days | 31 | 8 | 1939 | 5 |
| 100 F (37.8 C): Days | 3 | 1 | 1939 | 1 |
| 0 C (32 F): Frost days (min | 2 | 4 | 1937 | 4 |
| 20 C (68 F): Tropical nights (min | 26 | 30 | 1931 | 7 |
| 25 C (77 F): Days with min | 2 | 2 | 1963 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 41 | 19 | 1940 | 9 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 35 | 8 | 1940 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 13 | 2 | 1927 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1956 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1919.
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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).