Sonora, CA 95375 Frost Dates
95375, near Sonora, CA: the frost window
Typically, the last spring freeze lands around 05/02, roughly 247 days out. Fall's first freeze usually shows up around 11/04, roughly 183 days after the last spring frost.
Sonora sits in USDA Zone 7b (5 to 10°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
Sonora's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
05/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/29 and only about 1 year in 10 sees frost after that.
Sonora against the rest of the dataset
About 183 days separate Sonora's last and first frost, putting it 23,850 of 40,283 ZIP codes nationally. Within CA, it ranks 2,333 of 2,555.
Learn more
Two guides worth reading on 95375: zone vs. frost date, on why Zone 7b and Sonora's frost date answer different questions, and the frost range, on how to read the range around Sonora's dates instead of trusting one.