Mesa, AZ 85212 Frost Dates
Mesa, AZ: when does the frost end?
The last spring frost here typically falls around 02/01, about 157 days from today. Fall's first freeze usually shows up around 12/10, roughly 312 days after the last spring frost.
Mesa sits in USDA Zone 9b (25 to 30°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
With roughly 15 weeks until Mesa's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
02/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 02/28 and only about 1 year in 10 sees frost after that.
Mesa against the rest of the dataset
Mesa's growing season runs about 312 days, ranking 3,456 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 228 of 506.
Learn more
Before leaning on 85212's figures: zone vs. frost date explains why Zone 9b and Mesa's frost date answer different questions, while the frost range explains how to read the range around Mesa's dates instead of trusting one.