Madera, CA 93637 Frost Dates
Frost dates for Madera, CA, ZIP 93637
Around 02/12 is the usual last spring frost, about 168 days away. The first fall frost typically arrives around 11/30, about 293 frost-free days later.
The USDA Plant Hardiness Zone Map puts Madera in Zone 9a (20 to 25°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
Zone 9a around Madera has about 13 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.
Why 02/12 isn't a guarantee
02/12 is the middle of 30 years of NOAA records, not a promise. Plant by 01/06 and you're betting against frost in roughly 9 years out of 10. 03/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Madera compares
About 293 days separate Madera's last and first frost, putting it 4,266 of 40,283 ZIP codes nationally. Within CA, it ranks 1,651 of 2,555.
Learn more
zone vs. frost date explains why Zone 9a and Madera's frost date answer different questions, and the frost range explains how to read the range around Madera's dates instead of trusting one.