Youngtown, AZ 85373 Frost Dates
Youngtown, AZ: when does the frost end?
Around 01/20 is the usual last spring frost, about 145 days away. 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.
How much risk comes with planting early here
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
About 331 days separate Youngtown's last and first frost, putting it 2,950 of 40,283 ZIP codes nationally. Within AZ, it ranks 179 of 506.
Learn more
Before leaning on 85373's figures: zone vs. frost date explains why Zone 9b and Youngtown's frost date answer different questions, while the frost range explains how to read the range around Youngtown's dates instead of trusting one.