Lakeport, CA 95458 Frost Dates
95458, near Lakeport, CA: the frost window
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/06, roughly 209 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 Lakeport, not a forecast for this year.
Stretching the season past the first frost
Lakeport's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
Lakeport against the rest of the dataset
About 209 days separate Lakeport's last and first frost, putting it 15,216 of 40,283 ZIP codes nationally. Within CA, it ranks 2,231 of 2,555.
Learn more
Two guides worth reading on 95458: the frost range, on how to read the range around Lakeport's dates instead of trusting one, and local microclimates, on what one yard in Lakeport can differ from the 95458 normal.