Litchfield Park, AZ 85340 Frost Dates
Frost dates for Litchfield Park, AZ, ZIP 85340
The last spring frost here typically falls around 01/07, about 132 days from today. The first fall frost typically arrives around 12/24, about 351 frost-free days later.
Litchfield Park 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.
What to do before the first frost
Zone 9b around Litchfield Park has about 17 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
01/07 is the middle of 30 years of NOAA records, not a promise. Plant by 02/05 and you're betting against frost in roughly 9 years out of 10. 12/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Litchfield Park compares
Litchfield Park's growing season runs about 351 days, ranking 2,314 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 74 of 506.
Learn more
zone vs. frost date explains why Zone 9b and Litchfield Park's frost date answer different questions, and the frost range explains how to read the range around Litchfield Park's dates instead of trusting one.