Stevenson, WA 98610 Frost Dates
98610, near Stevenson, WA: the frost window
Around 03/24 is the usual last spring frost, about 208 days away. Fall's first freeze usually shows up around 11/20, roughly 242 days after the last spring frost.
Zone 8a (10 to 15°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 Stevenson, not a forecast for this year.
Stretching the season past the first frost
Stevenson's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/24 isn't a guarantee
03/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/28 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/16 and only about 1 year in 10 sees frost after that.
Stevenson against the rest of the dataset
About 242 days separate Stevenson's last and first frost, putting it 8,375 of 40,283 ZIP codes nationally. Within WA, it ranks 160 of 700.
Learn more
Two guides worth reading on 98610: local microclimates, on what one yard in Stevenson can differ from the 98610 normal, and zone vs. frost date, on why Zone 8a and Stevenson's frost date answer different questions.