Frost Dates for 89135 — Las Vegas, Nevada

Half of springs at Red Rock Canyon - Spg Mt Rch S, NV see their last 32°F night by March 13; only one in ten is past it by February 20, and one in ten still has one after April 11. Planting tender crops after March 29 leaves a 30% risk of a frost on them, after April 4 20%, and after April 11 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 15 in half of years, as early as October 31 one year in ten, and holds off past November 30 one year in ten. A hard freeze of 28°F follows 12 days later, around November 27; in spring the one-in-ten date for 28°F is March 19, 23 days before the 32°F one. The freeze-free season lasts 244 days in a typical year, longer than at 76% of the 38 Nevada stations; it reaches 275 days one year in ten and falls short of 210 one year in ten. On average 75 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 24 days longer, to about April 6, and return around November 5. Nights of 24°F, cold enough to damage hardier plants, come in 95% of winters and 16°F in 18%.

July is the warmest month at Red Rock Canyon - Spg Mt Rch S, NV, averaging 95°F by day and 73°F at night; December is the coldest at 52°F and 32°F. A freezing night is all but certain in every month from November to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 69% of years and April still brings one in 25% of years.

Warmth for growing adds up to 5,151 growing degree days a year (base 50°F), more than at 68% of the 38 Nevada stations. 36% of them (1,843) have built up by the end of June, and July adds the most, 1,054. Precipitation totals 10.0 inches a year, most in February (2.0") and least in June (0.1"); May to September bring 21% of it.

The nearest other station, Las Vegas Air Terminal, NV, 9 miles northeast of Las Vegas and 1,577 feet lower, has a last frost 48 days earlier (January 24), a first frost 25 days later (December 10), a season 79 days longer.

Measurable snow is rare here: only 11 of 25 winters from 1991 to 2020 recorded 0.1 inch or more at Red Rock Canyon - Spg Mt Rch S, NV, 8.8 miles away, so there is no typical first-snow date to plan around.

ZIP 89135 is 9 miles from Red Rock Canyon - Spg Mt Rch S, NV, which stands at 3,780 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 89135 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°C) over 1991–2020; a zone describes winter lows, not frost dates.