Oroville, CA 95968 Frost Dates
Oroville, CA: when does the frost end?
The last spring frost here typically falls around 01/29, about 154 days from today. Fall's first freeze usually shows up around 12/07, roughly 317 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Oroville in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 14 weeks until Oroville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/28 and only about 1 year in 10 sees frost after that.
Oroville against the rest of the dataset
At roughly 317 frost-free days, Oroville places 3,375 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,407 of 2,555.
Learn more
Before leaning on 95968's figures: the frost range explains how to read the range around Oroville's dates instead of trusting one, while local microclimates explains what one yard in Oroville can differ from the 95968 normal.