Corona, CA 92882 Frost Dates
92882, near Corona, CA: the frost window
Around 01/17 is the usual last spring frost, about 142 days away. Fall's first freeze usually shows up around 12/19, roughly 335 days after the last spring frost.
Zone 10a (30 to 35°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 Corona, not a forecast for this year.
Stretching the season past the first frost
Corona's growing season runs out in roughly 16 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 Corona's last frost
01/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/18 and only about 1 year in 10 sees frost after that.
Corona against the rest of the dataset
Corona's growing season runs about 335 days, ranking 2,736 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,232 of 2,555.
Learn more
Two guides worth reading on 92882: zone vs. frost date, on why Zone 10a and Corona's frost date answer different questions, and the frost range, on how to read the range around Corona's dates instead of trusting one.