Susanville, CA 95934 Frost Dates
Frost dates for Susanville, CA, ZIP 95934
The last spring frost here typically falls around 05/22, about 267 days from today. The first fall frost typically arrives around 09/25, about 122 frost-free days later.
Susanville sits in USDA Zone 7b (5 to 10°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
Zone 7b around Susanville has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Susanville's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Plant by 05/03 and you're betting against frost in roughly 9 years out of 10. 06/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Susanville compares
Susanville's growing season runs about 122 days, ranking 38,930 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,486 of 2,555.
Learn more
zone vs. frost date explains why Zone 7b and Susanville's frost date answer different questions, and the frost range explains how to read the range around Susanville's dates instead of trusting one.