Mammoth Lakes, CA 93644 Frost Dates
When can you plant in Mammoth Lakes, CA?
The last spring frost here typically falls around 03/25, about 209 days from today. The first fall frost typically arrives around 12/03, about 253 frost-free days later.
Mammoth Lakes sits in USDA Zone 9a (20 to 25°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 14 weeks of growing season left in Mammoth Lakes before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
03/25 is the middle of 30 years of NOAA records, not a promise. Plant by 02/05 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Mammoth Lakes compares
About 253 days separate Mammoth Lakes's last and first frost, putting it 7,138 of 40,283 ZIP codes nationally. Within CA, it ranks 2,080 of 2,555.
Learn more
the frost range covers how to read the range around Mammoth Lakes's dates instead of trusting one. local microclimates covers what one yard in Mammoth Lakes can differ from the 93644 normal.