Bullhead City, AZ 86442 Frost Dates
Frost dates for Bullhead City, AZ, ZIP 86442
Typically, the last spring freeze lands around 01/04, roughly 129 days out. The first fall frost typically arrives around 12/23, about 356 frost-free days later.
Bullhead City sits in USDA Zone 10a (30 to 35°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.
What to do before the first frost
Zone 10a around Bullhead City has about 17 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Bullhead City's last frost
01/04 is the middle of 30 years of NOAA records, not a promise. Plant by 02/05 and you're betting against frost in roughly 9 years out of 10. 12/12 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bullhead City compares
At roughly 356 frost-free days, Bullhead City places 2,108 of 40,283 ZIP codes in this dataset. Within AZ, it ranks 32 of 506.
Learn more
zone vs. frost date explains why Zone 10a and Bullhead City's frost date answer different questions, and the frost range explains how to read the range around Bullhead City's dates instead of trusting one.