Tustin McAf Threshold Days by Year (USW00093114)
13 fixed thresholds counted per year at Tustin McAf (USW00093114): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Tustin McAf Thresholds
- Tustin McAf: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1990 with 84.
- Tustin McAf: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 1990 with 41.
- Tustin McAf: days with a maximum temperature at or above 35 C (95 F) in 29 years, most in 1979 with 15.
- Tustin McAf: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1978 with 25.
- 13 fixed thresholds have at least one qualifying day at Tustin McAf.
Days at or above 30 C (86 F)
30 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1946 | 13 | 13 |
| 1968 | 30 | 30 |
| 1970 | 20 | 28.9 |
| 1971 | 36 | 28.9 |
| 1972 | 28 | 28.9 |
| 1973 | 19 | 28.9 |
| 1974 | 24 | 28.9 |
| 1975 | 13 | 28.9 |
| 1976 | 34 | 28.9 |
| 1977 | 23 | 28.9 |
| 1978 | 40 | 28.9 |
| 1979 | 52 | 28.9 |
| 1980 | 44 | 52.1 |
| 1981 | 67 | 52.1 |
| 1982 | 50 | 52.1 |
| 1983 | 58 | 52.1 |
| 1984 | 69 | 52.1 |
| 1985 | 57 | 52.1 |
| 1986 | 39 | 52.1 |
| 1987 | 38 | 52.1 |
| 1988 | 50 | 52.1 |
| 1989 | 49 | 52.1 |
| 1990 | 84 | 52.4 |
| 1991 | 41 | 52.4 |
| 1992 | 72 | 52.4 |
| 1993 | 35 | 52.4 |
| 1994 | 51 | 52.4 |
| 1995 | 42 | 52.4 |
| 1996 | 43 | 52.4 |
| 1997 | 51 | 52.4 |
| Year | First date | Last date |
|---|---|---|
| 1946 | 1946-07-26 | 1946-10-25 |
| 1968 | 1968-03-04 | 1968-11-08 |
| 1970 | 1970-05-02 | 1970-09-30 |
| 1971 | 1971-04-03 | 1971-10-11 |
| 1972 | 1972-05-27 | 1972-10-06 |
| 1973 | 1973-05-28 | 1973-12-09 |
| 1974 | 1974-05-25 | 1974-11-12 |
| 1975 | 1975-07-11 | 1975-11-24 |
| 1976 | 1976-01-15 | 1976-11-17 |
| 1977 | 1977-02-15 | 1977-11-29 |
| 1978 | 1978-03-16 | 1978-11-07 |
| 1979 | 1979-03-05 | 1979-12-06 |
| 1980 | 1980-04-08 | 1980-12-30 |
| 1981 | 1981-02-18 | 1981-11-09 |
| 1982 | 1982-02-19 | 1982-11-03 |
| 1983 | 1983-01-09 | 1983-11-03 |
| 1984 | 1984-01-28 | 1984-10-13 |
| 1985 | 1985-02-14 | 1985-10-16 |
| 1986 | 1986-01-11 | 1986-11-11 |
| 1987 | 1987-01-26 | 1987-11-19 |
| 1988 | 1988-01-24 | 1988-10-17 |
| 1989 | 1989-03-20 | 1989-12-23 |
| 1990 | 1990-03-20 | 1990-12-06 |
| 1991 | 1991-01-14 | 1991-11-24 |
| 1992 | 1992-02-24 | 1992-10-23 |
| 1993 | 1993-03-06 | 1993-12-02 |
| 1994 | 1994-03-13 | 1994-10-11 |
| 1995 | 1995-02-03 | 1995-10-03 |
| 1996 | 1996-01-11 | 1996-11-09 |
| 1997 | 1997-03-10 | 1997-11-03 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 30 | 84 | 1990 | 51 |
| 35 C (95 F): Days | 29 | 15 | 1979 | 10 |
| 40 C (104 F): Days | 10 | 3 | 1988 | 1 |
| 90 F (32.2 C): Days | 30 | 41 | 1990 | 23 |
| 100 F (37.8 C): Days | 19 | 6 | 1979 | 5 |
| 110 F (43.3 C): Days | 2 | 1 | 1985 | 1 |
| 0 C (32 F): Frost days (min | 14 | 8 | 1946 | 1 |
| 20 C (68 F): Tropical nights (min | 28 | 60 | 1984 | 21 |
| 25 C (77 F): Days with min | 3 | 1 | 1970 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 29 | 25 | 1978 | 7 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 25 | 8 | 1983 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 7 | 3 | 1995 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1983 | 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).