Coolidge, AZ 85128 Frost Dates
85128, near Coolidge, AZ: the frost window
The last spring frost here typically falls around 02/17, about 173 days from today. Fall's first freeze usually shows up around 11/29, roughly 284 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Coolidge in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Coolidge's growing season runs out in roughly 13 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 Coolidge's last frost
02/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/08 and only about 1 year in 10 sees frost after that.
Coolidge against the rest of the dataset
Coolidge's growing season runs about 284 days, ranking 4,676 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 284 of 506.
Learn more
Two guides worth reading on 85128: zone vs. frost date, on why Zone 9a and Coolidge's frost date answer different questions, and the frost range, on how to read the range around Coolidge's dates instead of trusting one.