The Dalles, OR 97058 Frost Dates
97058, near The Dalles, OR: the frost window
Typically, the last spring freeze lands around 04/14, roughly 229 days out. Fall's first freeze usually shows up around 10/23, roughly 191 days after the last spring frost.
The Dalles sits in USDA Zone 7b (5 to 10°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a 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.
Why 04/14 isn't a guarantee
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
The Dalles against the rest of the dataset
At roughly 191 frost-free days, The Dalles places 20,727 of 40,283 ZIP codes in this dataset. Within OR, it ranks 277 of 463.
Learn more
Two guides worth reading on 97058: the frost range, on how to read the range around The Dalles's dates instead of trusting one, and local microclimates, on what one yard in The Dalles can differ from the 97058 normal.