Big Bear Lake, CA 92305 Frost Dates
When can you plant in Big Bear Lake, CA?
Around 05/27 is the usual last spring frost, about 272 days away. The first fall frost typically arrives around 10/04, about 131 frost-free days later.
Big Bear Lake sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 5 weeks of growing season left in Big Bear Lake before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/27 isn't a guarantee
05/27 is the middle of 30 years of NOAA records, not a promise. Plant by 05/06 and you're betting against frost in roughly 9 years out of 10. 06/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Big Bear Lake compares
At roughly 131 frost-free days, Big Bear Lake places 38,264 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,458 of 2,555.
Learn more
local microclimates covers what one yard in Big Bear Lake can differ from the 92305 normal. zone vs. frost date covers why Zone 7a and Big Bear Lake's frost date answer different questions.