Las Vegas, NV 89166 Frost Dates
89166, near Las Vegas, NV: the frost window
Typically, the last spring freeze lands around 03/22, roughly 206 days out. Fall's first freeze usually shows up around 11/07, roughly 229 days after the last spring frost.
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.
Stretching the season past the first frost
Las Vegas's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Las Vegas's last frost
03/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Las Vegas against the rest of the dataset
Las Vegas's growing season runs about 229 days, ranking 10,494 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 117 of 222.
Learn more
Two guides worth reading on 89166: local microclimates, on what one yard in Las Vegas can differ from the 89166 normal, and zone vs. frost date, on why Zone 8b and Las Vegas's frost date answer different questions.