Bonanza Threshold Days by Year
14 fixed thresholds counted per year at Bonanza (USC00420802): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Bonanza Thresholds
- Bonanza: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1941 with 13.
- Bonanza: days with a maximum temperature at or above 30 C (86 F) in 38 years, most in 1958 with 107.
- Bonanza: days with a maximum temperature at or above 35 C (95 F) in 38 years, most in 1946 with 50.
- Bonanza: days with a maximum temperature at or above 90 F (32.2 C) in 38 years, most in 1956 with 79.
- 14 fixed thresholds have at least one qualifying day at Bonanza.
Days at or above 30 C (86 F)
38 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1939 | 70 | 70 |
| 1940 | 79 | 83.5 |
| 1941 | 56 | 83.5 |
| 1942 | 71 | 83.5 |
| 1943 | 98 | 83.5 |
| 1944 | 68 | 83.5 |
| 1945 | 83 | 83.5 |
| 1946 | 92 | 83.5 |
| 1947 | 94 | 83.5 |
| 1948 | 102 | 83.5 |
| 1949 | 92 | 83.5 |
| 1950 | 86 | 88.1 |
| 1951 | 86 | 88.1 |
| 1952 | 77 | 88.1 |
| 1953 | 97 | 88.1 |
| 1954 | 84 | 88.1 |
| 1955 | 91 | 88.1 |
| 1956 | 98 | 88.1 |
| 1957 | 65 | 88.1 |
| 1958 | 107 | 88.1 |
| 1959 | 90 | 88.1 |
| 1975 | 66 | 83 |
| 1976 | 83 | 83 |
| 1977 | 91 | 83 |
| 1978 | 85 | 83 |
| 1979 | 90 | 83 |
| 1980 | 78 | 75 |
| 1981 | 84 | 75 |
| 1982 | 71 | 75 |
| 1983 | 77 | 75 |
| 1984 | 78 | 75 |
| 1985 | 77 | 75 |
| 1986 | 60 | 75 |
| 1987 | 65 | 75 |
| 1988 | 93 | 75 |
| 1989 | 67 | 75 |
| 1990 | 78 | 64 |
| 1992 | 50 | 64 |
| Year | First date | Last date |
|---|---|---|
| 1939 | 1939-06-03 | 1939-09-04 |
| 1940 | 1940-05-30 | 1940-09-01 |
| 1941 | 1941-05-12 | 1941-09-03 |
| 1942 | 1942-06-03 | 1942-09-16 |
| 1943 | 1943-04-26 | 1943-09-17 |
| 1944 | 1944-05-29 | 1944-09-23 |
| 1945 | 1945-06-19 | 1945-10-08 |
| 1946 | 1946-04-26 | 1946-09-14 |
| 1947 | 1947-05-03 | 1947-10-06 |
| 1948 | 1948-05-15 | 1948-09-19 |
| 1949 | 1949-04-26 | 1949-09-24 |
| 1950 | 1950-04-23 | 1950-09-06 |
| 1951 | 1951-05-26 | 1951-09-26 |
| 1952 | 1952-06-06 | 1952-09-06 |
| 1953 | 1953-06-10 | 1953-09-25 |
| 1954 | 1954-05-08 | 1954-09-22 |
| 1955 | 1955-06-08 | 1955-09-18 |
| 1956 | 1956-05-19 | 1956-09-20 |
| 1957 | 1957-06-04 | 1957-09-30 |
| 1958 | 1958-05-21 | 1958-09-23 |
| 1959 | 1959-06-04 | 1959-09-15 |
| 1975 | 1975-05-15 | 1975-09-09 |
| 1976 | 1976-05-14 | 1976-09-06 |
| 1977 | 1977-05-31 | 1977-09-10 |
| 1978 | 1978-05-13 | 1978-09-28 |
| 1979 | 1979-05-23 | 1979-10-07 |
| 1980 | 1980-05-23 | 1980-10-02 |
| 1981 | 1981-05-02 | 1981-09-23 |
| 1982 | 1982-05-27 | 1982-09-25 |
| 1983 | 1983-05-27 | 1983-09-19 |
| 1984 | 1984-05-14 | 1984-09-20 |
| 1985 | 1985-06-07 | 1985-09-04 |
| 1986 | 1986-05-21 | 1986-09-08 |
| 1987 | 1987-05-15 | 1987-09-04 |
| 1988 | 1988-05-14 | 1988-09-10 |
| 1989 | 1989-05-09 | 1989-09-08 |
| 1990 | 1990-05-23 | 1990-10-28 |
| 1992 | 1992-04-30 | 1992-09-26 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 38 | 107 | 1958 | 50 |
| 35 C (95 F): Days | 38 | 50 | 1946 | 5 |
| 40 C (104 F): Days | 3 | 2 | 1983 | 2 |
| 90 F (32.2 C): Days | 38 | 79 | 1956 | 31 |
| 100 F (37.8 C): Days | 27 | 10 | 1943 | 4 |
| 0 C (32 F): Ice days (max | 37 | 83 | 1984 | 46 |
| 0 C (32 F): Frost days (min | 36 | 175 | 1942 | 163 |
| -10 C (14 F): Days with min | 36 | 89 | 1952 | 65 |
| -20 C (-4 F): Days with min | 32 | 32 | 1949 | 19 |
| -30 C (-22 F): Days with min | 7 | 4 | 1990 | 4 |
| 20 C (68 F): Tropical nights (min | 16 | 2 | 1982 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 40 | 13 | 1941 | 6 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 11 | 3 | 1941 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 26 | 5 | 1944 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.
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).