Bullhead City, AZ 86429 Frost Dates
Bullhead City, AZ: when does the frost end?
Typically, the last spring freeze lands around 01/05, roughly 130 days out. Fall's first freeze usually shows up around 12/24, roughly 354 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Bullhead City in Zone 9b (25 to 30°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 17 weeks until Bullhead City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
01/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/11 and only about 1 year in 10 sees frost after that.
Bullhead City against the rest of the dataset
About 354 days separate Bullhead City's last and first frost, putting it 2,175 of 40,283 ZIP codes nationally. Within AZ, it ranks 52 of 506.
Learn more
Before leaning on 86429's figures: zone vs. frost date explains why Zone 9b and Bullhead City's frost date answer different questions, while the frost range explains how to read the range around Bullhead City's dates instead of trusting one.