Sahuarita, AZ 85740 Frost Dates
85740, near Sahuarita, AZ: the frost window
The last spring frost here typically falls around 04/26, about 241 days from today. Fall's first freeze usually shows up around 11/04, roughly 195 days after the last spring frost.
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 Sahuarita, not a forecast for this year.
Stretching the season past the first frost
Sahuarita's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Sahuarita against the rest of the dataset
At roughly 195 frost-free days, Sahuarita places 19,183 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 408 of 506.
Learn more
Two guides worth reading on 85740: the frost range, on how to read the range around Sahuarita's dates instead of trusting one, and local microclimates, on what one yard in Sahuarita can differ from the 85740 normal.