Casa Grande, AZ 85130 Frost Dates
When can you plant in Casa Grande, AZ?
Around 02/05 is the usual last spring frost, about 161 days away. The first fall frost typically arrives around 12/06, about 305 frost-free days later.
The USDA Plant Hardiness Zone Map puts Casa Grande in Zone 9a (20 to 25°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
About 14 weeks of growing season left in Casa Grande before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 02/05 isn't a guarantee
02/05 is the middle of 30 years of NOAA records, not a promise. Plant by 01/05 and you're betting against frost in roughly 9 years out of 10. 02/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Casa Grande compares
At roughly 305 frost-free days, Casa Grande places 3,730 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 247 of 506.
Learn more
the frost range covers how to read the range around Casa Grande's dates instead of trusting one. local microclimates covers what one yard in Casa Grande can differ from the 85130 normal.