Sparks, NV 89431 Frost Dates
89431, near Sparks, NV: the frost window
The last spring frost here typically falls around 05/01, about 246 days from today. Fall's first freeze usually shows up around 10/10, roughly 160 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sparks 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
Sparks's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/17 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/25 and only about 1 year in 10 sees frost after that.
Sparks against the rest of the dataset
Sparks's growing season runs about 160 days, ranking 32,192 of 40,283 US ZIP codes measured here, longest to shortest. Within NV, it ranks 155 of 222.
Learn more
Two guides worth reading on 89431: zone vs. frost date, on why Zone 7a and Sparks's frost date answer different questions, and the frost range, on how to read the range around Sparks's dates instead of trusting one.