Fowler, CA 93609 Frost Dates
Frost dates for Fowler, CA, ZIP 93609
The last spring frost here typically falls around 02/24, about 180 days from today. The first fall frost typically arrives around 11/22, about 265 frost-free days later.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Fowler, not a forecast for this year.
What to do before the first frost
Zone 9a around Fowler has about 12 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 02/24 isn't a guarantee
02/24 is the middle of 30 years of NOAA records, not a promise. Plant by 01/21 and you're betting against frost in roughly 9 years out of 10. 03/30 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Fowler compares
About 265 days separate Fowler's last and first frost, putting it 5,979 of 40,283 ZIP codes nationally. Within CA, it ranks 2,000 of 2,555.
Learn more
zone vs. frost date explains why Zone 9a and Fowler's frost date answer different questions, and the frost range explains how to read the range around Fowler's dates instead of trusting one.