Sahuarita, AZ 85645 Frost Dates
85645, near Sahuarita, AZ: the frost window
The last spring frost here typically falls around 04/05, about 220 days from today. Fall's first freeze usually shows up around 11/10, roughly 217 days after the last spring frost.
Sahuarita sits in USDA Zone 8b (15 to 20°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.
Stretching the season past the first frost
Sahuarita's growing season runs out in roughly 11 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Sahuarita's last frost
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Sahuarita against the rest of the dataset
At roughly 217 frost-free days, Sahuarita places 13,409 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 359 of 506.
Learn more
Two guides worth reading on 85645: local microclimates, on what one yard in Sahuarita can differ from the 85645 normal, and zone vs. frost date, on why Zone 8b and Sahuarita's frost date answer different questions.