Susanville, CA 89432 Frost Dates
When can you plant in Susanville, CA?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. The first fall frost typically arrives around 10/15, about 169 frost-free days later.
Susanville 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 7 weeks of growing season left in Susanville before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/28 isn't a guarantee
04/28 is the middle of 30 years of NOAA records, not a promise. Plant by 04/12 and you're betting against frost in roughly 9 years out of 10. 05/15 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Susanville compares
Susanville's growing season runs about 169 days, ranking 29,359 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,381 of 2,555.
Learn more
local microclimates covers what one yard in Susanville can differ from the 89432 normal. zone vs. frost date covers why Zone 7a and Susanville's frost date answer different questions.