Boulder City, NV 86444 Frost Dates
86444, near Boulder City, NV: the frost window
The last spring frost here typically falls around 03/05, about 189 days from today. Fall's first freeze usually shows up around 11/28, roughly 265 days after the last spring frost.
Boulder City sits in USDA Zone 9a (20 to 25°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
Boulder City's growing season runs out in roughly 13 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 Boulder City's last frost
03/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/28 and only about 1 year in 10 sees frost after that.
Boulder City against the rest of the dataset
About 265 days separate Boulder City's last and first frost, putting it 5,976 of 40,283 ZIP codes nationally. Within NV, it ranks 99 of 222.
Learn more
Two guides worth reading on 86444: the frost range, on how to read the range around Boulder City's dates instead of trusting one, and local microclimates, on what one yard in Boulder City can differ from the 86444 normal.