Oroville, CA 95914 Frost Dates
When can you plant in Oroville, CA?
The last spring frost here typically falls around 01/29, about 154 days from today. The first fall frost typically arrives around 12/07, about 317 frost-free days later.
Zone 9b (25 to 30°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Oroville, not a forecast for this year.
What to do before the first frost
About 14 weeks of growing season left in Oroville 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
01/29 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 12/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oroville compares
About 317 days separate Oroville's last and first frost, putting it 3,372 of 40,283 ZIP codes nationally. Within CA, it ranks 1,404 of 2,555.
Learn more
the frost range covers how to read the range around Oroville's dates instead of trusting one. local microclimates covers what one yard in Oroville can differ from the 95914 normal.