Patagonia, AZ 85646 Frost Dates
When can you plant in Patagonia, AZ?
Around 04/05 is the usual last spring frost, about 220 days away. The first fall frost typically arrives around 11/10, about 217 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Patagonia, not a forecast for this year.
What to do before the first frost
About 11 weeks of growing season left in Patagonia before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Patagonia's last frost
04/05 is the middle of 30 years of NOAA records, not a promise. Plant by 03/13 and you're betting against frost in roughly 9 years out of 10. 04/25 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Patagonia compares
At roughly 217 frost-free days, Patagonia places 13,576 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 366 of 506.
Learn more
the frost range covers how to read the range around Patagonia's dates instead of trusting one. local microclimates covers what one yard in Patagonia can differ from the 85646 normal.