Phoenix, AZ 85006 Frost Dates
85006, near Phoenix, AZ: the frost window
The last spring frost here typically falls around 01/05, about 130 days from today. Fall's first freeze usually shows up around 01/03, roughly 365 days after the last spring frost.
Zone 10a (30 to 35°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Phoenix, not a forecast for this year.
Stretching the season past the first frost
Phoenix's growing season runs out in roughly 18 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Phoenix's last frost
01/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/19 and only about 1 year in 10 sees frost after that.
Phoenix against the rest of the dataset
Phoenix's growing season runs about 365 days, ranking 8 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 3 of 506.
Learn more
Two guides worth reading on 85006: local microclimates, on what one yard in Phoenix can differ from the 85006 normal, and zone vs. frost date, on why Zone 10a and Phoenix's frost date answer different questions.