Hanna Threshold Days by Year (CA003023000)
17 fixed thresholds counted per year at Hanna (CA003023000): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Hanna Thresholds
- Hanna: nights with a minimum temperature at or below 0 C (32 F) in 40 years, most in 1965 with 228.
- Hanna: nights with a minimum temperature at or below -10 C (14 F) in 40 years, most in 1951 with 142.
- Hanna: nights with a minimum temperature at or below -20 C (-4 F) in 40 years, most in 1955 with 74.
- Hanna: days with a maximum temperature at or above 30 C (86 F) in 39 years, most in 1958 with 20.
- 17 fixed thresholds have at least one qualifying day at Hanna.
Days at or above 30 C (86 F)
39 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1924 | 9 | 10.8 |
| 1925 | 10 | 10.8 |
| 1928 | 10 | 10.8 |
| 1929 | 14 | 10.8 |
| 1930 | 12 | 12.8 |
| 1937 | 14 | 12.8 |
| 1938 | 11 | 12.8 |
| 1939 | 14 | 12.8 |
| 1940 | 5 | 10.1 |
| 1941 | 17 | 10.1 |
| 1942 | 4 | 10.1 |
| 1943 | 8 | 10.1 |
| 1944 | 7 | 10.1 |
| 1945 | 12 | 10.1 |
| 1946 | 9 | 10.1 |
| 1947 | 19 | 10.1 |
| 1948 | 7 | 10.1 |
| 1949 | 13 | 10.1 |
| 1950 | 8 | 11.4 |
| 1951 | 4 | 11.4 |
| 1953 | 16 | 11.4 |
| 1954 | 9 | 11.4 |
| 1955 | 18 | 11.4 |
| 1956 | 12 | 11.4 |
| 1957 | 8 | 11.4 |
| 1958 | 20 | 11.4 |
| 1959 | 8 | 11.4 |
| 1960 | 18 | 10.7 |
| 1962 | 5 | 10.7 |
| 1963 | 12 | 10.7 |
| 1964 | 7 | 10.7 |
| 1965 | 11 | 10.7 |
| 1968 | 9 | 10.7 |
| 1969 | 13 | 10.7 |
| 1971 | 17 | 10.2 |
| 1972 | 7 | 10.2 |
| 1973 | 8 | 10.2 |
| 1974 | 9 | 10.2 |
| 1975 | 10 | 10.2 |
| Year | First date | Last date |
|---|---|---|
| 1924 | 1924-05-15 | 1924-07-25 |
| 1925 | 1925-06-20 | 1925-08-26 |
| 1928 | 1928-05-22 | 1928-09-03 |
| 1929 | 1929-07-02 | 1929-08-30 |
| 1930 | 1930-06-07 | 1930-08-24 |
| 1937 | 1937-06-21 | 1937-09-12 |
| 1938 | 1938-06-19 | 1938-09-03 |
| 1939 | 1939-04-29 | 1939-08-25 |
| 1940 | 1940-07-03 | 1940-08-12 |
| 1941 | 1941-05-23 | 1941-08-22 |
| 1942 | 1942-07-02 | 1942-08-17 |
| 1943 | 1943-07-06 | 1943-08-17 |
| 1944 | 1944-05-28 | 1944-07-27 |
| 1945 | 1945-06-21 | 1945-08-18 |
| 1946 | 1946-07-11 | 1946-08-23 |
| 1947 | 1947-07-06 | 1947-08-08 |
| 1948 | 1948-06-07 | 1948-09-10 |
| 1949 | 1949-06-09 | 1949-08-17 |
| 1950 | 1950-06-20 | 1950-09-24 |
| 1951 | 1951-07-24 | 1951-08-04 |
| 1953 | 1953-05-07 | 1953-08-20 |
| 1954 | 1954-07-04 | 1954-07-26 |
| 1955 | 1955-07-13 | 1955-09-02 |
| 1956 | 1956-06-01 | 1956-08-21 |
| 1957 | 1957-07-11 | 1957-07-30 |
| 1958 | 1958-05-28 | 1958-08-25 |
| 1959 | 1959-07-11 | 1959-08-01 |
| 1960 | 1960-07-06 | 1960-09-13 |
| 1962 | 1962-06-24 | 1962-08-16 |
| 1963 | 1963-06-19 | 1963-09-09 |
| 1964 | 1964-07-08 | 1964-08-18 |
| 1965 | 1965-06-10 | 1965-08-12 |
| 1968 | 1968-06-26 | 1968-09-10 |
| 1969 | 1969-06-04 | 1969-09-02 |
| 1971 | 1971-07-16 | 1971-08-21 |
| 1972 | 1972-05-30 | 1972-08-28 |
| 1973 | 1973-06-22 | 1973-08-13 |
| 1974 | 1974-06-23 | 1974-08-05 |
| 1975 | 1975-07-03 | 1975-08-05 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 39 | 20 | 1958 | 10 |
| 35 C (95 F): Days | 13 | 4 | 1937 | 1 |
| 90 F (32.2 C): Days | 38 | 10 | 1929 | 2 |
| 100 F (37.8 C): Days | 2 | 1 | 1937 | 1 |
| 0 C (32 F): Ice days (max | 39 | 133 | 1950 | 91 |
| 0 C (32 F): Frost days (min | 40 | 228 | 1965 | 174 |
| -10 C (14 F): Days with min | 40 | 142 | 1951 | 106 |
| -20 C (-4 F): Days with min | 40 | 74 | 1955 | 35 |
| -30 C (-22 F): Days with min | 39 | 30 | 1950 | 8 |
| -40 C (-40 F): Days with min | 10 | 13 | 1950 | 4 |
| 20 C (68 F): Tropical nights (min | 3 | 6 | 1937 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 39 | 18 | 1942 | 6 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 29 | 4 | 1954 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 6 | 1 | 1924 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1962 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 32 | 6 | 1948 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 3 | 1 | 1950 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.
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 (2026-10-17).