Pima, AZ 85530 Frost Dates
Pima, AZ: when does the frost end?
The last spring frost here typically falls around 04/01, about 216 days from today. Fall's first freeze usually shows up around 11/06, roughly 217 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Pima in Zone 8b (15 to 20°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
With roughly 10 weeks until Pima's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Pima's last frost
04/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Pima against the rest of the dataset
Pima's growing season runs about 217 days, ranking 13,485 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 362 of 506.
Learn more
Before leaning on 85530's figures: the frost range explains how to read the range around Pima's dates instead of trusting one, while local microclimates explains what one yard in Pima can differ from the 85530 normal.