Lake Havasu City, AZ 86438 Frost Dates
When can you plant in Lake Havasu City, AZ?
Around 02/18 is the usual last spring frost, about 174 days away. The first fall frost typically arrives around 12/02, about 288 frost-free days later.
The USDA Plant Hardiness Zone Map puts Lake Havasu City in Zone 9a (20 to 25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 14 weeks of growing season left in Lake Havasu City before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Lake Havasu City's last frost
02/18 is the middle of 30 years of NOAA records, not a promise. Plant by 01/24 and you're betting against frost in roughly 9 years out of 10. 03/16 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Lake Havasu City compares
Lake Havasu City's growing season runs about 288 days, ranking 4,563 of 40,283 US ZIP codes measured here, longest to shortest. Within AZ, it ranks 278 of 506.
Learn more
zone vs. frost date covers why Zone 9a and Lake Havasu City's frost date answer different questions. the frost range covers how to read the range around Lake Havasu City's dates instead of trusting one.