Adelanto, CA 92342 Frost Dates
Frost dates for Adelanto, CA, ZIP 92342
The last spring frost here typically falls around 03/18, about 202 days from today. The first fall frost typically arrives around 11/11, about 233 frost-free days later.
Adelanto sits in USDA Zone 8b (15 to 20°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 8b around Adelanto has about 11 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.
How much risk comes with planting early here
03/18 is the middle of 30 years of NOAA records, not a promise. Plant by 02/23 and you're betting against frost in roughly 9 years out of 10. 04/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Adelanto compares
At roughly 233 frost-free days, Adelanto places 9,855 of 40,283 ZIP codes in this dataset. Within CA, it ranks 2,155 of 2,555.
Learn more
zone vs. frost date explains why Zone 8b and Adelanto's frost date answer different questions, and the frost range explains how to read the range around Adelanto's dates instead of trusting one.