Carson, NV 89440 Frost Dates
89440, near Carson, NV: the frost window
Around 05/12 is the usual last spring frost, about 257 days away. Fall's first freeze usually shows up around 10/17, roughly 155 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Carson in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Carson's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/12 isn't a guarantee
05/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/05 and only about 1 year in 10 sees frost after that.
Carson against the rest of the dataset
At roughly 155 frost-free days, Carson places 33,914 of 40,283 ZIP codes in this dataset. Within NV, it ranks 162 of 222.
Learn more
Two guides worth reading on 89440: zone vs. frost date, on why Zone 7a and Carson's frost date answer different questions, and the frost range, on how to read the range around Carson's dates instead of trusting one.