Poway, CA 92196 Frost Dates
92196, near Poway, CA: the frost window
Typically, the last spring freeze lands around 03/04, roughly 188 days out. Fall's first freeze usually shows up around 12/04, roughly 270 days after the last spring frost.
Zone 10b (35 to 40°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 Poway, not a forecast for this year.
Stretching the season past the first frost
Poway'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.
How much risk comes with planting early here
03/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/29 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/10 and only about 1 year in 10 sees frost after that.
Poway against the rest of the dataset
About 270 days separate Poway's last and first frost, putting it 5,551 of 40,283 ZIP codes nationally. Within CA, it ranks 1,971 of 2,555.
Learn more
Two guides worth reading on 92196: local microclimates, on what one yard in Poway can differ from the 92196 normal, and zone vs. frost date, on why Zone 10b and Poway's frost date answer different questions.