Milpitas, CA 95133 Frost Dates
When can you plant in Milpitas, CA?
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.
The USDA Plant Hardiness Zone Map puts Milpitas in Zone 9b (25 to 30°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 17 weeks of growing season left in Milpitas before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
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
At roughly 362 frost-free days, Milpitas places 2,065 of 40,283 ZIP codes in this dataset. Within CA, it ranks 951 of 2,555.
Learn more
zone vs. frost date covers why Zone 9b and Milpitas's frost date answer different questions. the frost range covers how to read the range around Milpitas's dates instead of trusting one.