Las Vegas, NV 89081 Frost Dates
89081, near Las Vegas, NV: the frost window
The last spring frost here typically falls around 03/10, about 194 days from today. Fall's first freeze usually shows up around 11/19, roughly 253 days after the last spring frost.
Zone 9b (25 to 30°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.
Stretching the season past the first frost
Las Vegas's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/10 isn't a guarantee
03/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Las Vegas against the rest of the dataset
About 253 days separate Las Vegas's last and first frost, putting it 7,067 of 40,283 ZIP codes nationally. Within NV, it ranks 101 of 222.
Learn more
Two guides worth reading on 89081: zone vs. frost date, on why Zone 9b and Las Vegas's frost date answer different questions, and the frost range, on how to read the range around Las Vegas's dates instead of trusting one.