Moraga, CA 94556 Frost Dates
Frost dates for Moraga, CA, ZIP 94556
Typically, the last spring freeze lands around 01/03, roughly 128 days out. The first fall frost typically arrives around 01/01, about 365 frost-free days later.
The USDA Plant Hardiness Zone Map puts Moraga 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
Zone 9b around Moraga has about 18 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 Moraga's last frost
01/03 is the middle of 30 years of NOAA records, not a promise. Plant by 02/14 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 Moraga compares
About 365 days separate Moraga's last and first frost, putting it 1,516 of 40,283 ZIP codes nationally. Within CA, it ranks 781 of 2,555.
Learn more
zone vs. frost date explains why Zone 9b and Moraga's frost date answer different questions, and the frost range explains how to read the range around Moraga's dates instead of trusting one.