Boulder City, NV 89044 Frost Dates
Frost dates for Boulder City, NV, ZIP 89044
The last spring frost here typically falls around 02/04, about 160 days from today. The first fall frost typically arrives around 12/05, about 302 frost-free days later.
Zone 9a (20 to 25°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 Boulder City, not a forecast for this year.
What to do before the first frost
Zone 9a around Boulder City has about 14 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.
How much risk comes with planting early here
02/04 is the middle of 30 years of NOAA records, not a promise. Plant by 01/10 and you're betting against frost in roughly 9 years out of 10. 02/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Boulder City compares
Boulder City's growing season runs about 302 days, ranking 3,803 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 92 of 222.
Learn more
the frost range explains how to read the range around Boulder City's dates instead of trusting one, and local microclimates explains what one yard in Boulder City can differ from the 89044 normal.