Kingman, AZ 86409 Frost Dates
86409, near Kingman, AZ: the frost window
Around 04/02 is the usual last spring frost, about 217 days away. Fall's first freeze usually shows up around 11/11, roughly 220 days after the last spring frost.
Kingman sits in USDA Zone 8b (15 to 20°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.
Stretching the season past the first frost
Kingman's growing season runs out in roughly 11 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 Kingman's last frost
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Kingman against the rest of the dataset
About 220 days separate Kingman's last and first frost, putting it 12,690 of 40,283 ZIP codes nationally. Within AZ, it ranks 353 of 506.
Learn more
Two guides worth reading on 86409: zone vs. frost date, on why Zone 8b and Kingman's frost date answer different questions, and the frost range, on how to read the range around Kingman's dates instead of trusting one.