Las Vegas, NV 89020 Frost Dates
Frost dates for Las Vegas, NV, ZIP 89020
The last spring frost here typically falls around 03/15, about 199 days from today. The first fall frost typically arrives around 11/13, about 237 frost-free days later.
Las Vegas sits in USDA Zone 8b (15 to 20°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 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 03/15 isn't a guarantee
03/15 is the middle of 30 years of NOAA records, not a promise. Plant by 02/21 and you're betting against frost in roughly 9 years out of 10. 04/09 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 237 days, ranking 9,063 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 115 of 222.
Learn more
zone vs. frost date explains why Zone 8b 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.