Big Bear Lake, CA 92315 Frost Dates
Big Bear Lake, CA: when does the frost end?
Typically, the last spring freeze lands around 05/27, roughly 272 days out. Fall's first freeze usually shows up around 10/04, roughly 131 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Big Bear Lake in Zone 7b (5 to 10°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 5 weeks until Big Bear Lake'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
05/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/09 and only about 1 year in 10 sees frost after that.
Big Bear Lake against the rest of the dataset
About 131 days separate Big Bear Lake's last and first frost, putting it 38,267 of 40,283 ZIP codes nationally. Within CA, it ranks 2,461 of 2,555.
Learn more
Before leaning on 92315's figures: local microclimates explains what one yard in Big Bear Lake can differ from the 92315 normal, while zone vs. frost date explains why Zone 7b and Big Bear Lake's frost date answer different questions.