Thousand Oaks, CA 91362 Frost Dates
Frost dates for Thousand Oaks, CA, ZIP 91362
Around 12/31 is the usual last spring frost, about 125 days away. The first fall frost typically arrives around 12/28, about 365 frost-free days later.
Thousand Oaks 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 Thousand Oaks 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.
The actual range around Thousand Oaks's last frost
12/31 is the middle of 30 years of NOAA records, not a promise. Plant by 02/02 and you're betting against frost in roughly 9 years out of 10. 12/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Thousand Oaks compares
Thousand Oaks's growing season runs about 365 days, ranking 430 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 168 of 2,555.
Learn more
local microclimates explains what one yard in Thousand Oaks can differ from the 91362 normal, and zone vs. frost date explains why Zone 10b and Thousand Oaks's frost date answer different questions.