Rocklin, CA 95677 Frost Dates
When can you plant in Rocklin, CA?
The last spring frost here typically falls around 01/12, about 137 days from today. The first fall frost typically arrives around 12/16, about 341 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 Rocklin, not a forecast for this year.
What to do before the first frost
About 16 weeks of growing season left in Rocklin before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/12 isn't a guarantee
01/12 is the middle of 30 years of NOAA records, not a promise. Plant by 02/08 and you're betting against frost in roughly 9 years out of 10. 12/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rocklin compares
At roughly 341 frost-free days, Rocklin places 2,602 of 40,283 ZIP codes in this dataset. Within CA, it ranks 1,159 of 2,555.
Learn more
the frost range covers how to read the range around Rocklin's dates instead of trusting one. local microclimates covers what one yard in Rocklin can differ from the 95677 normal.