Colfax, CA 95703 Frost Dates
Colfax, CA: when does the frost end?
Around 04/03 is the usual last spring frost, about 218 days away. Fall's first freeze usually shows up around 11/24, roughly 233 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 Colfax, not a forecast for this year.
Stretching the season past the first frost
With roughly 13 weeks until Colfax's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Colfax's last frost
04/03 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 04/29 and only about 1 year in 10 sees frost after that.
Colfax against the rest of the dataset
At roughly 233 frost-free days, Colfax places 9,911 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,161 of 2,555.
Learn more
Before leaning on 95703's figures: the frost range explains how to read the range around Colfax's dates instead of trusting one, while local microclimates explains what one yard in Colfax can differ from the 95703 normal.