Gilbert, AZ 85236 Frost Dates
Frost dates for Gilbert, AZ, ZIP 85236
Around 02/01 is the usual last spring frost, about 157 days away. The first fall frost typically arrives around 12/11, about 315 frost-free days later.
Gilbert 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 Gilbert has about 15 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 Gilbert's last frost
02/01 is the middle of 30 years of NOAA records, not a promise. Plant by 01/02 and you're betting against frost in roughly 9 years out of 10. 02/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Gilbert compares
About 315 days separate Gilbert's last and first frost, putting it 3,391 of 40,283 ZIP codes nationally. Within AZ, it ranks 203 of 506.
Learn more
local microclimates explains what one yard in Gilbert can differ from the 85236 normal, and zone vs. frost date explains why Zone 9b and Gilbert's frost date answer different questions.