Placerville, CA 95709 Frost Dates
95709, near Placerville, CA: the frost window
Typically, the last spring freeze lands around 03/31, roughly 215 days out. Fall's first freeze usually shows up around 11/21, roughly 237 days after the last spring frost.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Placerville, not a forecast for this year.
Stretching the season past the first frost
Placerville's growing season runs out in roughly 12 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 Placerville's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/23 and only about 1 year in 10 sees frost after that.
Placerville against the rest of the dataset
Placerville's growing season runs about 237 days, ranking 9,092 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,136 of 2,555.
Learn more
Two guides worth reading on 95709: zone vs. frost date, on why Zone 9a and Placerville's frost date answer different questions, and the frost range, on how to read the range around Placerville's dates instead of trusting one.