Las Vegas, NV 92389 Frost Dates
Frost dates for Las Vegas, NV, ZIP 92389
The last spring frost here typically falls around 03/29, about 213 days from today. The first fall frost typically arrives around 11/03, about 218 frost-free days later.
The USDA Plant Hardiness Zone Map puts Las Vegas 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
Zone 9a around Las Vegas has about 10 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.
The actual range around Las Vegas's last frost
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/06 and you're betting against frost in roughly 9 years out of 10. 04/21 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 218 days, ranking 13,133 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 123 of 222.
Learn more
zone vs. frost date explains why Zone 9a and Las Vegas's frost date answer different questions, and the frost range explains how to read the range around Las Vegas's dates instead of trusting one.