Milpitas, CA 95131 Frost Dates
Frost dates for Milpitas, CA, ZIP 95131
The last spring frost here typically falls around 01/02, about 127 days from today. The first fall frost typically arrives around 12/25, about 362 frost-free days later.
Milpitas 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 Milpitas 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
01/02 is the middle of 30 years of NOAA records, not a promise. Plant by 01/23 and you're betting against frost in roughly 9 years out of 10. 12/14 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Milpitas compares
About 362 days separate Milpitas's last and first frost, putting it 2,063 of 40,283 ZIP codes nationally. Within CA, it ranks 949 of 2,555.
Learn more
local microclimates explains what one yard in Milpitas can differ from the 95131 normal, and zone vs. frost date explains why Zone 10a and Milpitas's frost date answer different questions.