Sonora, CA 95364 Frost Dates
Sonora, CA: when does the frost end?
Around 05/02 is the usual last spring frost, about 247 days away. Fall's first freeze usually shows up around 11/04, roughly 183 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sonora in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 10 weeks until Sonora's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Sonora's last frost
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
Sonora's growing season runs about 183 days, ranking 23,849 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,332 of 2,555.
Learn more
Before leaning on 95364's figures: zone vs. frost date explains why Zone 6b and Sonora's frost date answer different questions, while the frost range explains how to read the range around Sonora's dates instead of trusting one.