Las Vegas, NV 89103 Frost Dates
Frost dates for Las Vegas, NV, ZIP 89103
Typically, the last spring freeze lands around 01/20, roughly 145 days out. The first fall frost typically arrives around 12/15, about 333 frost-free days later.
Las Vegas sits in USDA Zone 9a (20 to 25°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.
What to do before the first frost
Zone 9a around Las Vegas has about 16 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
01/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/14 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Las Vegas compares
Las Vegas's growing season runs about 333 days, ranking 2,803 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 1 of 222.
Learn more
local microclimates explains what one yard in Las Vegas can differ from the 89103 normal, and zone vs. frost date explains why Zone 9a and Las Vegas's frost date answer different questions.