Redwood City, CA 94065 Frost Dates
Frost dates for Redwood City, CA, ZIP 94065
Typically, the last spring freeze lands around 01/17, roughly 142 days out. The first fall frost typically arrives around 12/12, about 333 frost-free days later.
Redwood City sits in USDA Zone 10a (30 to 35°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 10a around Redwood City has about 15 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 Redwood City's last frost
01/17 is the middle of 30 years of NOAA records, not a promise. Plant by 02/16 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Redwood City compares
Redwood City's growing season runs about 333 days, ranking 2,817 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 1,282 of 2,555.
Learn more
the frost range explains how to read the range around Redwood City's dates instead of trusting one, and local microclimates explains what one yard in Redwood City can differ from the 94065 normal.