Youngtown, AZ 85395 Frost Dates
Youngtown, AZ: when does the frost end?
The last spring frost here typically falls around 01/20, about 145 days from today. Fall's first freeze usually shows up around 12/15, roughly 331 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Youngtown in Zone 9b (25 to 30°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 16 weeks until Youngtown's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/20 isn't a guarantee
01/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/23 and only about 1 year in 10 sees frost after that.
Youngtown against the rest of the dataset
Youngtown's growing season runs about 331 days, ranking 2,952 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 181 of 506.
Learn more
Before leaning on 85395's figures: the frost range explains how to read the range around Youngtown's dates instead of trusting one, while local microclimates explains what one yard in Youngtown can differ from the 85395 normal.