Frost Dates for 89081 — North Las Vegas, Nevada

Half of springs at Mercury 3 SSW, NV see their last 32°F night by March 10; only one in ten is past it by February 17, and one in ten still has one after April 8. Planting tender crops after March 22 leaves a 30% risk of a frost on them, after March 31 20%, and after April 8 10%. The 29 days between the even-odds date and the one-in-ten date is wider than at 92% of the 38 Nevada stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 19 in half of years, as early as November 1 one year in ten, and holds off past December 2 one year in ten. A hard freeze of 28°F follows 11 days later, around November 30; in spring the one-in-ten date for 28°F is March 9, 30 days before the 32°F one. The freeze-free season lasts 253 days in a typical year, longer than at 82% of the 38 Nevada stations; it reaches 278 days one year in ten and falls short of 222 one year in ten. On average 47 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 25 days longer, to about April 4, and return around November 8. Nights of 24°F, cold enough to damage hardier plants, come in 94% of winters and 16°F in 10%.

July is the warmest month at Mercury 3 SSW, NV, averaging 100°F by day and 71°F at night; December is the coldest at 54°F and 32°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to October the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 66% of years and April still brings one in 20% of years.

Warmth for growing adds up to 5,421 growing degree days a year (base 50°F), more than at 76% of the 38 Nevada stations. 36% of them (1,973) have built up by the end of June, and July adds the most, 1,097. Precipitation totals 5.4 inches a year, most in February (1.0") and least in June (0.1"); May to September bring 26% of it.

The nearest other station, Desert Nwr, NV, 20 miles southeast of North Las Vegas and 370 feet lower, has a last frost 12 days later (March 22), a first frost 12 days earlier (November 7), a season 24 days shorter.

Measurable snow is rare here: only 8 of 29 winters from 1991 to 2020 recorded 0.1 inch or more at Desert Nwr, NV, 19.8 miles away, so there is no typical first-snow date to plan around.

ZIP 89081 is 20 miles from Mercury 3 SSW, NV, which stands at 3,284 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 89081 in zone 9b, the band where the coldest night of the year averaged 25 to 30°F (-3.9 to -1.1°C) over 1991–2020; a zone describes winter lows, not frost dates.