Hamilton Af Base Threshold Days by Year (USW00023211)
11 fixed thresholds counted per year at Hamilton Af Base (USW00023211): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Hamilton Af Base Thresholds
- Hamilton Af Base: nights with a minimum temperature at or below 0 C (32 F) in 33 years, most in 1949 with 36.
- Hamilton Af Base: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1941 with 41.
- Hamilton Af Base: days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1940 with 21.
- Hamilton Af Base: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1939 with 48.
- 11 fixed thresholds have at least one qualifying day at Hamilton Af Base.
Days at or above 30 C (86 F)
31 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1934 | 42 | 42.3 |
| 1935 | 37 | 42.3 |
| 1939 | 48 | 42.3 |
| 1940 | 19 | 25.9 |
| 1941 | 27 | 25.9 |
| 1942 | 14 | 25.9 |
| 1943 | 33 | 25.9 |
| 1944 | 27 | 25.9 |
| 1945 | 37 | 25.9 |
| 1949 | 24 | 25.9 |
| 1950 | 36 | 22.3 |
| 1951 | 19 | 22.3 |
| 1952 | 31 | 22.3 |
| 1953 | 14 | 22.3 |
| 1954 | 18 | 22.3 |
| 1955 | 18 | 22.3 |
| 1956 | 16 | 22.3 |
| 1957 | 22 | 22.3 |
| 1958 | 18 | 22.3 |
| 1959 | 31 | 22.3 |
| 1960 | 18 | 14.6 |
| 1961 | 22 | 14.6 |
| 1962 | 11 | 14.6 |
| 1963 | 19 | 14.6 |
| 1964 | 18 | 14.6 |
| 1965 | 5 | 14.6 |
| 1966 | 14 | 14.6 |
| 1967 | 10 | 14.6 |
| 1968 | 16 | 14.6 |
| 1969 | 13 | 14.6 |
| 1970 | 21 | 21 |
| Year | First date | Last date |
|---|---|---|
| 1934 | 1934-05-10 | 1934-10-10 |
| 1935 | 1935-05-04 | 1935-09-30 |
| 1939 | 1939-04-05 | 1939-10-21 |
| 1940 | 1940-05-13 | 1940-10-18 |
| 1941 | 1941-05-20 | 1941-10-03 |
| 1942 | 1942-05-19 | 1942-10-21 |
| 1943 | 1943-05-09 | 1943-10-05 |
| 1944 | 1944-05-04 | 1944-10-24 |
| 1945 | 1945-04-23 | 1945-10-05 |
| 1949 | 1949-05-05 | 1949-10-01 |
| 1950 | 1950-05-20 | 1950-10-13 |
| 1951 | 1951-05-25 | 1951-10-07 |
| 1952 | 1952-03-25 | 1952-10-02 |
| 1953 | 1953-06-22 | 1953-10-05 |
| 1954 | 1954-05-22 | 1954-09-25 |
| 1955 | 1955-05-18 | 1955-09-11 |
| 1956 | 1956-05-15 | 1956-09-28 |
| 1957 | 1957-04-28 | 1957-09-22 |
| 1958 | 1958-05-15 | 1958-10-16 |
| 1959 | 1959-05-07 | 1959-10-23 |
| 1960 | 1960-05-31 | 1960-09-25 |
| 1961 | 1961-06-14 | 1961-10-15 |
| 1962 | 1962-06-18 | 1962-09-16 |
| 1963 | 1963-07-25 | 1963-09-28 |
| 1964 | 1964-04-14 | 1964-10-03 |
| 1965 | 1965-08-09 | 1965-10-07 |
| 1966 | 1966-06-12 | 1966-10-09 |
| 1967 | 1967-05-16 | 1967-10-14 |
| 1968 | 1968-06-15 | 1968-09-25 |
| 1969 | 1969-05-05 | 1969-09-25 |
| 1970 | 1970-05-14 | 1970-10-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 31 | 48 | 1939 | 21 |
| 35 C (95 F): Days | 28 | 12 | 1935 | 2 |
| 40 C (104 F): Days | 5 | 2 | 1950 | 1 |
| 90 F (32.2 C): Days | 30 | 22 | 1939 | 12 |
| 100 F (37.8 C): Days | 11 | 4 | 1939 | 3 |
| 0 C (32 F): Frost days (min | 33 | 36 | 1949 | 8 |
| 20 C (68 F): Tropical nights (min | 1 | 1 | 1950 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 33 | 41 | 1941 | 32 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 33 | 21 | 1940 | 18 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 24 | 7 | 1952 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1967 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.
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).