Las Vegas, NV 89161 Frost Dates
Frost dates for Las Vegas, NV, ZIP 89161
Typically, the last spring freeze lands around 03/13, roughly 197 days out. The first fall frost typically arrives around 11/15, about 244 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Las Vegas, not a forecast for this year.
What to do before the first frost
Zone 8b around Las Vegas has about 11 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.
Why 03/13 isn't a guarantee
03/13 is the middle of 30 years of NOAA records, not a promise. Plant by 02/20 and you're betting against frost in roughly 9 years out of 10. 04/11 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Las Vegas compares
About 244 days separate Las Vegas's last and first frost, putting it 8,094 of 40,283 ZIP codes nationally. Within NV, it ranks 110 of 222.
Learn more
the frost range explains how to read the range around Las Vegas's dates instead of trusting one, and local microclimates explains what one yard in Las Vegas can differ from the 89161 normal.