Litchfield Park, AZ 85323 Frost Dates
Litchfield Park, AZ: when does the frost end?
Typically, the last spring freeze lands around 01/07, roughly 132 days out. Fall's first freeze usually shows up around 12/24, roughly 351 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Litchfield Park 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 17 weeks until Litchfield Park'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
01/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/17 and only about 1 year in 10 sees frost after that.
Litchfield Park against the rest of the dataset
Litchfield Park's growing season runs about 351 days, ranking 2,312 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 72 of 506.
Learn more
Before leaning on 85323's figures: zone vs. frost date explains why Zone 9b and Litchfield Park's frost date answer different questions, while the frost range explains how to read the range around Litchfield Park's dates instead of trusting one.