Thatcher, AZ 85552 Frost Dates
Thatcher, AZ: when does the frost end?
The last spring frost here typically falls around 03/25, about 209 days from today. Fall's first freeze usually shows up around 11/09, roughly 228 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Thatcher 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 Thatcher's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Thatcher's last frost
03/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/14 and only about 1 year in 10 sees frost after that.
Thatcher against the rest of the dataset
At roughly 228 frost-free days, Thatcher places 10,803 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 337 of 506.
Learn more
Before leaning on 85552's figures: local microclimates explains what one yard in Thatcher can differ from the 85552 normal, while zone vs. frost date explains why Zone 8b and Thatcher's frost date answer different questions.