Big Bear Lake, CA 92427 Frost Dates
Big Bear Lake, CA: when does the frost end?
Around 05/27 is the usual last spring frost, about 272 days away. 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 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
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.
The actual range around Big Bear Lake's last frost
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 38,271 of 40,283 ZIP codes nationally. Within CA, it ranks 2,465 of 2,555.
Learn more
Before leaning on 92427's figures: local microclimates explains what one yard in Big Bear Lake can differ from the 92427 normal, while zone vs. frost date explains why Zone 10a and Big Bear Lake's frost date answer different questions.