Reno, NV 89509 Frost Dates
89509, near Reno, NV: the frost window
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/23, roughly 184 days after the last spring frost.
Zone 7b (5 to 10°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 Reno, not a forecast for this year.
Stretching the season past the first frost
Reno's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Reno against the rest of the dataset
About 184 days separate Reno's last and first frost, putting it 23,375 of 40,283 ZIP codes nationally. Within NV, it ranks 136 of 222.
Learn more
Two guides worth reading on 89509: the frost range, on how to read the range around Reno's dates instead of trusting one, and local microclimates, on what one yard in Reno can differ from the 89509 normal.