Loomis, CA 95663 Frost Dates
Frost dates for Loomis, CA, ZIP 95663
Typically, the last spring freeze lands around 04/03, roughly 218 days out. The first fall frost typically arrives around 11/24, about 233 frost-free days later.
Loomis sits in USDA Zone 9b (25 to 30°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 9b around Loomis 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 04/03 isn't a guarantee
04/03 is the middle of 30 years of NOAA records, not a promise. Plant by 02/28 and you're betting against frost in roughly 9 years out of 10. 04/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Loomis compares
Loomis's growing season runs about 233 days, ranking 9,887 of 40,283 US ZIP codes measured here, longest to shortest. Within CA, it ranks 2,160 of 2,555.
Learn more
zone vs. frost date explains why Zone 9b and Loomis's frost date answer different questions, and the frost range explains how to read the range around Loomis's dates instead of trusting one.