Ripon, CA 95366 Frost Dates
95366, near Ripon, CA: the frost window
The last spring frost here typically falls around 02/06, about 162 days from today. Fall's first freeze usually shows up around 12/01, roughly 304 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ripon in Zone 9b (25 to 30°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
Ripon's growing season runs out in roughly 14 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 Ripon's last frost
02/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/31 and only about 1 year in 10 sees frost after that.
Ripon against the rest of the dataset
Ripon's growing season runs about 304 days, ranking 3,764 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,529 of 2,555.
Learn more
Two guides worth reading on 95366: the frost range, on how to read the range around Ripon's dates instead of trusting one, and local microclimates, on what one yard in Ripon can differ from the 95366 normal.