Oro Valley, AZ 85741 Frost Dates
When can you plant in Oro Valley, AZ?
Typically, the last spring freeze lands around 02/26, roughly 182 days out. The first fall frost typically arrives around 12/04, about 279 frost-free days later.
Zone 9a (20 to 25°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 Oro Valley, not a forecast for this year.
What to do before the first frost
About 14 weeks of growing season left in Oro Valley before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
02/26 is the middle of 30 years of NOAA records, not a promise. Plant by 01/29 and you're betting against frost in roughly 9 years out of 10. 03/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oro Valley compares
At roughly 279 frost-free days, Oro Valley places 4,863 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 294 of 506.
Learn more
the frost range covers how to read the range around Oro Valley's dates instead of trusting one. local microclimates covers what one yard in Oro Valley can differ from the 85741 normal.