Alameda NAS Threshold Days by Year (USW00023239)
10 fixed thresholds counted per year at Alameda NAS (USW00023239): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Alameda NAS Thresholds
- Alameda NAS: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1976 with 15.
- Alameda NAS: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1983 with 39.
- Alameda NAS: days with 25 mm (0.98 in) or more of precipitation in 50 years, most in 1973 with 8.
- Alameda NAS: days with a maximum temperature at or above 90 F (32.2 C) in 43 years, most in 1976 with 12.
- 10 fixed thresholds have at least one qualifying day at Alameda NAS.
Days at or above 30 C (86 F)
51 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1946 | 8 | 7.5 |
| 1947 | 13 | 7.5 |
| 1948 | 3 | 7.5 |
| 1949 | 6 | 7.5 |
| 1950 | 6 | 5.2 |
| 1951 | 6 | 5.2 |
| 1952 | 4 | 5.2 |
| 1953 | 6 | 5.2 |
| 1954 | 5 | 5.2 |
| 1955 | 3 | 5.2 |
| 1956 | 3 | 5.2 |
| 1957 | 5 | 5.2 |
| 1958 | 8 | 5.2 |
| 1959 | 6 | 5.2 |
| 1960 | 5 | 6.5 |
| 1961 | 9 | 6.5 |
| 1962 | 2 | 6.5 |
| 1963 | 4 | 6.5 |
| 1964 | 12 | 6.5 |
| 1965 | 7 | 6.5 |
| 1966 | 11 | 6.5 |
| 1967 | 7 | 6.5 |
| 1968 | 7 | 6.5 |
| 1969 | 1 | 6.5 |
| 1970 | 14 | 8.4 |
| 1971 | 10 | 8.4 |
| 1972 | 5 | 8.4 |
| 1973 | 11 | 8.4 |
| 1974 | 6 | 8.4 |
| 1975 | 6 | 8.4 |
| 1976 | 15 | 8.4 |
| 1977 | 3 | 8.4 |
| 1978 | 8 | 8.4 |
| 1979 | 6 | 8.4 |
| 1980 | 6 | 7.4 |
| 1981 | 9 | 7.4 |
| 1982 | 5 | 7.4 |
| 1983 | 13 | 7.4 |
| 1984 | 11 | 7.4 |
| 1985 | 5 | 7.4 |
| 1986 | 1 | 7.4 |
| 1987 | 8 | 7.4 |
| 1988 | 6 | 7.4 |
| 1989 | 10 | 7.4 |
| 1990 | 3 | 7.1 |
| 1991 | 3 | 7.1 |
| 1992 | 1 | 7.1 |
| 1993 | 13 | 7.1 |
| 1994 | 6 | 7.1 |
| 1995 | 15 | 7.1 |
| 1996 | 9 | 7.1 |
| Year | First date | Last date |
|---|---|---|
| 1946 | 1946-04-23 | 1946-10-11 |
| 1947 | 1947-04-12 | 1947-10-12 |
| 1948 | 1948-06-22 | 1948-09-13 |
| 1949 | 1949-05-06 | 1949-09-22 |
| 1950 | 1950-05-29 | 1950-09-04 |
| 1951 | 1951-05-25 | 1951-10-07 |
| 1952 | 1952-09-01 | 1952-10-01 |
| 1953 | 1953-06-24 | 1953-10-05 |
| 1954 | 1954-06-20 | 1954-10-14 |
| 1955 | 1955-05-18 | 1955-09-01 |
| 1956 | 1956-05-16 | 1956-09-22 |
| 1957 | 1957-06-16 | 1957-09-07 |
| 1958 | 1958-05-15 | 1958-10-09 |
| 1959 | 1959-06-29 | 1959-10-13 |
| 1960 | 1960-06-02 | 1960-09-25 |
| 1961 | 1961-06-14 | 1961-10-15 |
| 1962 | 1962-06-19 | 1962-08-27 |
| 1963 | 1963-07-26 | 1963-09-26 |
| 1964 | 1964-06-22 | 1964-10-02 |
| 1965 | 1965-08-13 | 1965-10-24 |
| 1966 | 1966-03-31 | 1966-10-31 |
| 1967 | 1967-09-12 | 1967-10-17 |
| 1968 | 1968-07-18 | 1968-09-25 |
| 1969 | 1969-10-31 | 1969-10-31 |
| 1970 | 1970-05-15 | 1970-10-01 |
| 1971 | 1971-08-23 | 1971-10-12 |
| 1972 | 1972-05-12 | 1972-07-13 |
| 1973 | 1973-05-28 | 1973-09-28 |
| 1974 | 1974-05-26 | 1974-10-17 |
| 1975 | 1975-05-28 | 1975-09-24 |
| 1976 | 1976-05-12 | 1976-10-12 |
| 1977 | 1977-07-29 | 1977-08-29 |
| 1978 | 1978-05-30 | 1978-10-13 |
| 1979 | 1979-06-07 | 1979-09-12 |
| 1980 | 1980-06-27 | 1980-10-03 |
| 1981 | 1981-04-28 | 1981-08-27 |
| 1982 | 1982-05-23 | 1982-10-09 |
| 1983 | 1983-05-19 | 1983-09-21 |
| 1984 | 1984-05-27 | 1984-09-28 |
| 1985 | 1985-06-10 | 1985-10-04 |
| 1986 | 1986-06-09 | 1986-06-09 |
| 1987 | 1987-04-21 | 1987-10-06 |
| 1988 | 1988-04-10 | 1988-10-17 |
| 1989 | 1989-04-06 | 1989-10-09 |
| 1990 | 1990-06-20 | 1990-10-03 |
| 1991 | 1991-07-01 | 1991-10-10 |
| 1992 | 1992-09-26 | 1992-09-26 |
| 1993 | 1993-05-09 | 1993-10-27 |
| 1994 | 1994-06-09 | 1994-10-08 |
| 1995 | 1995-06-23 | 1995-10-13 |
| 1996 | 1996-04-29 | 1996-10-08 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 51 | 15 | 1976 | 9 |
| 35 C (95 F): Days | 20 | 5 | 1976 | 2 |
| 90 F (32.2 C): Days | 43 | 12 | 1976 | 6 |
| 100 F (37.8 C): Days | 7 | 3 | 1976 | 1 |
| 0 C (32 F): Frost days (min | 7 | 7 | 1972 | 3 |
| 20 C (68 F): Tropical nights (min | 8 | 1 | 1949 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 51 | 39 | 1983 | 27 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 50 | 8 | 1973 | 8 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 10 | 3 | 1962 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1982 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1946.
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).