Youngtown, AZ 85351 Frost Dates
Youngtown, AZ: when does the frost end?
Typically, the last spring freeze lands around 01/20, roughly 145 days out. Fall's first freeze usually shows up around 12/15, roughly 331 days after the last spring frost.
Youngtown 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 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
Youngtown's growing season runs about 331 days, ranking 2,948 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 177 of 506.
Learn more
Before leaning on 85351'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.