Williams, AZ 86046 Frost Dates
Williams, AZ: when does the frost end?
Typically, the last spring freeze lands around 05/22, roughly 267 days out. Fall's first freeze usually shows up around 10/05, roughly 135 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Williams in Zone 7a (0 to 5°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 5 weeks until Williams's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Williams's last frost
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/10 and only about 1 year in 10 sees frost after that.
Williams against the rest of the dataset
About 135 days separate Williams's last and first frost, putting it 37,861 of 40,283 ZIP codes nationally. Within AZ, it ranks 489 of 506.
Learn more
Before leaning on 86046's figures: zone vs. frost date explains why Zone 7a and Williams's frost date answer different questions, while the frost range explains how to read the range around Williams's dates instead of trusting one.