Las Vegas, NV 89109 Frost Dates
When can you plant in Las Vegas, NV?
Typically, the last spring freeze lands around 01/20, roughly 145 days out. The first fall frost typically arrives around 12/15, about 333 frost-free days later.
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.
What to do before the first frost
About 16 weeks of growing season left in Las Vegas before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 01/20 isn't a guarantee
01/20 is the middle of 30 years of NOAA records, not a promise. Plant by 02/14 and you're betting against frost in roughly 9 years out of 10. 12/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Las Vegas compares
At roughly 333 frost-free days, Las Vegas places 2,804 of 40,283 ZIP codes in this dataset. Within NV, it ranks 2 of 222.
Learn more
zone vs. frost date covers why Zone 9b and Las Vegas's frost date answer different questions. the frost range covers how to read the range around Las Vegas's dates instead of trusting one.