Avondale, AZ 85380 Frost Dates
Avondale, AZ: when does the frost end?
Typically, the last spring freeze lands around 01/14, roughly 139 days out. Fall's first freeze usually shows up around 12/22, roughly 343 days after the last spring frost.
Zone 9b (25 to 30°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 Avondale, not a forecast for this year.
Stretching the season past the first frost
With roughly 17 weeks until Avondale's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 01/14 isn't a guarantee
01/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/12 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.
Avondale against the rest of the dataset
At roughly 343 frost-free days, Avondale places 2,519 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 133 of 506.
Learn more
Before leaning on 85380's figures: the frost range explains how to read the range around Avondale's dates instead of trusting one, while local microclimates explains what one yard in Avondale can differ from the 85380 normal.