Bullhead City, AZ 86427 Frost Dates
86427, near Bullhead City, AZ: the frost window
The last spring frost here typically falls around 01/04, about 129 days from today. Fall's first freeze usually shows up around 12/23, roughly 356 days after the last spring frost.
Bullhead City sits in USDA Zone 9b (25 to 30°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
Bullhead City's growing season runs out in roughly 17 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
01/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/12 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 356 days, ranking 2,105 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 29 of 506.
Learn more
Two guides worth reading on 86427: zone vs. frost date, on why Zone 9b and Bullhead City's frost date answer different questions, and the frost range, on how to read the range around Bullhead City's dates instead of trusting one.