Bullhead City, AZ 92323 Frost Dates
Bullhead City, AZ: when does the frost end?
Typically, the last spring freeze lands around 03/06, roughly 190 days out. Fall's first freeze usually shows up around 12/08, roughly 272 days after the last spring frost.
Bullhead City 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
With roughly 15 weeks until Bullhead City's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/06 isn't a guarantee
03/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 01/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/09 and only about 1 year in 10 sees frost after that.
Bullhead City against the rest of the dataset
Bullhead City's growing season runs about 272 days, ranking 5,328 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 307 of 506.
Learn more
Before leaning on 92323's figures: zone vs. frost date explains why Zone 8b 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.