Chelan, WA 98816 Frost Dates
98816, near Chelan, WA: the frost window
Around 05/14 is the usual last spring frost, about 259 days away. Fall's first freeze usually shows up around 10/01, roughly 140 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Chelan 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
Chelan's growing season runs out in roughly 5 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 Chelan's last frost
05/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/04 and only about 1 year in 10 sees frost after that.
Chelan against the rest of the dataset
About 140 days separate Chelan's last and first frost, putting it 37,050 of 40,283 ZIP codes nationally. Within WA, it ranks 613 of 700.
Learn more
Two guides worth reading on 98816: zone vs. frost date, on why Zone 7a and Chelan's frost date answer different questions, and the frost range, on how to read the range around Chelan's dates instead of trusting one.