Banning, CA 92230 Frost Dates
Banning, CA: when does the frost end?
Typically, the last spring freeze lands around 05/16, roughly 261 days out. Fall's first freeze usually shows up around 10/24, roughly 160 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Banning 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
With roughly 8 weeks until Banning's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Banning against the rest of the dataset
About 160 days separate Banning's last and first frost, putting it 32,234 of 40,283 ZIP codes nationally. Within CA, it ranks 2,415 of 2,555.
Learn more
Before leaning on 92230's figures: the frost range explains how to read the range around Banning's dates instead of trusting one, while local microclimates explains what one yard in Banning can differ from the 92230 normal.