Sausalito, CA 94121 Frost Dates
Frost dates for Sausalito, CA, ZIP 94121
Typically, the last spring freeze lands around 12/30, roughly 124 days out. The first fall frost typically arrives around 12/25, about 365 frost-free days later.
Sausalito sits in USDA Zone 10b (35 to 40°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 10b around Sausalito has about 17 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.
How much risk comes with planting early here
12/30 is the middle of 30 years of NOAA records, not a promise. Plant by 03/13 and you're betting against frost in roughly 9 years out of 10. 12/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Sausalito compares
Sausalito's growing season runs about 365 days, ranking 1,765 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 863 of 2,555.
Learn more
local microclimates explains what one yard in Sausalito can differ from the 94121 normal, and zone vs. frost date explains why Zone 10b and Sausalito's frost date answer different questions.