Del Bonita Threshold Days by Year (USC00242301)
18 fixed thresholds counted per year at Del Bonita (USC00242301): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Del Bonita Thresholds
- Del Bonita: days with 10 mm (0.39 in) or more of precipitation in 47 years, most in 1995 with 20.
- Del Bonita: nights with a minimum temperature at or below 0 C (32 F) in 46 years, most in 1982 with 220.
- Del Bonita: nights with a minimum temperature at or below -10 C (14 F) in 46 years, most in 1982 with 98.
- Del Bonita: nights with a minimum temperature at or below -20 C (-4 F) in 46 years, most in 1972 with 42.
- 18 fixed thresholds have at least one qualifying day at Del Bonita.
Days at or above 30 C (86 F)
43 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1961 | 20 | 9.1 |
| 1962 | 3 | 9.1 |
| 1963 | 12 | 9.1 |
| 1964 | 2 | 9.1 |
| 1965 | 4 | 9.1 |
| 1966 | 4 | 9.1 |
| 1967 | 22 | 9.1 |
| 1968 | 4 | 9.1 |
| 1969 | 11 | 9.1 |
| 1970 | 16 | 9.8 |
| 1971 | 25 | 9.8 |
| 1972 | 5 | 9.8 |
| 1973 | 15 | 9.8 |
| 1974 | 10 | 9.8 |
| 1975 | 7 | 9.8 |
| 1976 | 4 | 9.8 |
| 1977 | 3 | 9.8 |
| 1978 | 7 | 9.8 |
| 1979 | 6 | 9.8 |
| 1980 | 2 | 11.2 |
| 1981 | 12 | 11.2 |
| 1982 | 6 | 11.2 |
| 1983 | 14 | 11.2 |
| 1984 | 19 | 11.2 |
| 1985 | 13 | 11.2 |
| 1986 | 11 | 11.2 |
| 1987 | 7 | 11.2 |
| 1988 | 25 | 11.2 |
| 1989 | 3 | 11.2 |
| 1990 | 12 | 10.1 |
| 1991 | 5 | 10.1 |
| 1992 | 8 | 10.1 |
| 1993 | 2 | 10.1 |
| 1994 | 10 | 10.1 |
| 1997 | 7 | 10.1 |
| 1998 | 24 | 10.1 |
| 1999 | 13 | 10.1 |
| 2000 | 28 | 17.8 |
| 2001 | 28 | 17.8 |
| 2008 | 9 | 17.8 |
| 2009 | 6 | 17.8 |
| 2010 | 3 | 2.5 |
| 2011 | 2 | 2.5 |
| Year | First date | Last date |
|---|---|---|
| 1961 | 1961-06-16 | 1961-08-25 |
| 1962 | 1962-08-12 | 1962-08-17 |
| 1963 | 1963-07-21 | 1963-09-29 |
| 1964 | 1964-07-12 | 1964-07-13 |
| 1965 | 1965-08-02 | 1965-08-10 |
| 1966 | 1966-08-02 | 1966-09-06 |
| 1967 | 1967-07-14 | 1967-09-06 |
| 1968 | 1968-07-05 | 1968-07-28 |
| 1969 | 1969-06-18 | 1969-08-25 |
| 1970 | 1970-06-04 | 1970-08-31 |
| 1971 | 1971-07-16 | 1971-08-28 |
| 1972 | 1972-08-09 | 1972-08-29 |
| 1973 | 1973-07-09 | 1973-08-21 |
| 1974 | 1974-06-16 | 1974-08-05 |
| 1975 | 1975-07-04 | 1975-07-28 |
| 1976 | 1976-07-17 | 1976-08-23 |
| 1977 | 1977-07-22 | 1977-07-24 |
| 1978 | 1978-07-15 | 1978-09-03 |
| 1979 | 1979-07-18 | 1979-08-11 |
| 1980 | 1980-07-22 | 1980-07-23 |
| 1981 | 1981-07-05 | 1981-09-18 |
| 1982 | 1982-07-29 | 1982-09-03 |
| 1983 | 1983-07-31 | 1983-09-01 |
| 1984 | 1984-06-28 | 1984-08-23 |
| 1985 | 1985-07-02 | 1985-07-22 |
| 1986 | 1986-05-30 | 1986-08-29 |
| 1987 | 1987-06-14 | 1987-07-30 |
| 1988 | 1988-06-16 | 1988-09-06 |
| 1989 | 1989-07-07 | 1989-07-19 |
| 1990 | 1990-06-30 | 1990-08-15 |
| 1991 | 1991-08-08 | 1991-09-01 |
| 1992 | 1992-06-09 | 1992-09-30 |
| 1993 | 1993-05-11 | 1993-05-12 |
| 1994 | 1994-07-21 | 1994-08-15 |
| 1997 | 1997-08-03 | 1997-08-24 |
| 1998 | 1998-07-17 | 1998-09-08 |
| 1999 | 1999-07-12 | 1999-08-29 |
| 2000 | 2000-07-12 | 2000-08-24 |
| 2001 | 2001-05-23 | 2001-09-25 |
| 2008 | 2008-05-17 | 2008-08-24 |
| 2009 | 2009-07-25 | 2009-09-24 |
| 2010 | 2010-08-25 | 2010-08-27 |
| 2011 | 2011-07-18 | 2011-08-22 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 43 | 28 | 2000 | 2 |
| 35 C (95 F): Days | 9 | 10 | 2000 | 3 |
| 90 F (32.2 C): Days | 32 | 16 | 2000 | 1 |
| 100 F (37.8 C): Days | 1 | 1 | 1961 | 1 |
| 0 C (32 F): Ice days (max | 44 | 86 | 1975 | 71 |
| 0 C (32 F): Frost days (min | 46 | 220 | 1982 | 192 |
| -10 C (14 F): Days with min | 46 | 98 | 1982 | 72 |
| -20 C (-4 F): Days with min | 46 | 42 | 1972 | 26 |
| -30 C (-22 F): Days with min | 38 | 16 | 1969 | 2 |
| -40 C (-40 F): Days with min | 2 | 2 | 1971 | 2 |
| 20 C (68 F): Tropical nights (min | 1 | 1 | 1972 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 47 | 20 | 1995 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 38 | 7 | 1978 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 11 | 3 | 2010 | 3 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 2010 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 39 | 13 | 1994 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 9 | 1 | 1968 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 1968 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.
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).