Poway, CA 92127 Frost Dates
92127, near Poway, CA: the frost window
Around 01/02 is the usual last spring frost, about 127 days away. Fall's first freeze usually shows up around 12/30, roughly 365 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Poway in Zone 10a (30 to 35°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
Poway's growing season runs out in roughly 18 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 Poway's last frost
01/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/14 and only about 1 year in 10 sees frost after that.
Poway against the rest of the dataset
About 365 days separate Poway's last and first frost, putting it 895 of 40,283 ZIP codes nationally. Within CA, it ranks 363 of 2,555.
Learn more
Two guides worth reading on 92127: local microclimates, on what one yard in Poway can differ from the 92127 normal, and zone vs. frost date, on why Zone 10a and Poway's frost date answer different questions.