The Dalles, OR 98635 Frost Dates
98635, near The Dalles, OR: the frost window
Typically, the last spring freeze lands around 04/11, roughly 226 days out. Fall's first freeze usually shows up around 10/26, roughly 197 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts The Dalles in Zone 7b (5 to 10°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
The Dalles'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.
How much risk comes with planting early here
04/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
The Dalles against the rest of the dataset
About 197 days separate The Dalles's last and first frost, putting it 18,637 of 40,283 ZIP codes nationally. Within OR, it ranks 239 of 463.
Learn more
Two guides worth reading on 98635: local microclimates, on what one yard in The Dalles can differ from the 98635 normal, and zone vs. frost date, on why Zone 7b and The Dalles's frost date answer different questions.