Colusa, CA 95932 Frost Dates
95932, near Colusa, CA: the frost window
Around 02/14 is the usual last spring frost, about 170 days away. Fall's first freeze usually shows up around 12/01, roughly 293 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Colusa 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
Colusa'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 Colusa's last frost
02/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/31 and only about 1 year in 10 sees frost after that.
Colusa against the rest of the dataset
About 293 days separate Colusa's last and first frost, putting it 4,287 of 40,283 ZIP codes nationally. Within CA, it ranks 1,663 of 2,555.
Learn more
Two guides worth reading on 95932: zone vs. frost date, on why Zone 9b and Colusa's frost date answer different questions, and the frost range, on how to read the range around Colusa's dates instead of trusting one.