Frost Dates for 86401 — Kingman, Arizona

Half of springs at Kingman Mohave Co Airport, AZ see their last 32°F night by April 2; only one in ten is past it by March 8, and one in ten still has one after April 21. Planting tender crops after April 10 leaves a 30% risk of a frost on them, after April 15 20%, and after April 21 10%. The 19 days between the even-odds date and the one-in-ten date is narrower than at 61% of the 98 Arizona stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 11 in half of years, as early as October 26 one year in ten, and holds off past November 24 one year in ten. A hard freeze of 28°F follows 11 days later, around November 22; in spring the one-in-ten date for 28°F is April 5, 16 days before the 32°F one. The freeze-free season lasts 220 days in a typical year, shorter than at 59% of the 98 Arizona stations; it reaches 249 days one year in ten and falls short of 195 one year in ten. On average 66 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 18 days longer, to about April 20, and return around October 31. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 36%.

July is the warmest month at Kingman Mohave Co Airport, AZ, averaging 99°F by day and 70°F at night; December is the coldest at 56°F and 30°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 51% of years.

Warmth for growing adds up to 5,325 growing degree days a year (base 50°F), fewer than at 56% of the 102 Arizona stations. 36% of them (1,915) have built up by the end of June, and July adds the most, 1,065. Precipitation totals 8.1 inches a year, most in January (1.0") and least in May (0.1"); May to September bring 37% of it.

The nearest other station, Bullhead City, AZ, 36 miles west of Kingman and 2,889 feet lower, has a last frost 88 days earlier (January 4), a first frost 42 days later (December 23), a season 136 days longer.

Measurable snow is rare here: only 1 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Yucca 1 NNE, AZ, 28.3 miles away, so there is no typical first-snow date to plan around.

ZIP 86401 is 1 mile from Kingman Mohave Co Airport, AZ, which stands at 3,420 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 86409 (Kingman). The 2023 USDA Plant Hardiness Zone Map lists ZIP 86401 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.