North Powder, OR 97867 Frost Dates
97867, near North Powder, OR: the frost window
The last spring frost here typically falls around 05/11, about 256 days from today. Fall's first freeze usually shows up around 09/26, roughly 136 days after the last spring frost.
North Powder sits in USDA Zone 6b (-5 to 0°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
North Powder's growing season runs out in roughly 4 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
05/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/31 and only about 1 year in 10 sees frost after that.
North Powder against the rest of the dataset
North Powder's growing season runs about 136 days, ranking 37,763 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 384 of 463.
Learn more
Two guides worth reading on 97867: the frost range, on how to read the range around North Powder's dates instead of trusting one, and local microclimates, on what one yard in North Powder can differ from the 97867 normal.