Tustin, CA 92782 Frost Dates
92782, near Tustin, CA: the frost window
Typically, the last spring freeze lands around 01/05, roughly 130 days out. Fall's first freeze usually shows up around 12/25, roughly 365 days after the last spring frost.
Tustin sits in USDA Zone 10a (30 to 35°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Tustin's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Tustin's last frost
01/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Tustin against the rest of the dataset
About 365 days separate Tustin's last and first frost, putting it 688 of 40,283 ZIP codes nationally. Within CA, it ranks 305 of 2,555.
Learn more
Two guides worth reading on 92782: the frost range, on how to read the range around Tustin's dates instead of trusting one, and local microclimates, on what one yard in Tustin can differ from the 92782 normal.