Powers, OR 97466 Frost Dates
97466, near Powers, OR: the frost window
Typically, the last spring freeze lands around 03/30, roughly 214 days out. Fall's first freeze usually shows up around 11/17, roughly 233 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Powers in Zone 9a (20 to 25°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
Powers'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.
The actual range around Powers's last frost
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Powers against the rest of the dataset
About 233 days separate Powers's last and first frost, putting it 9,954 of 40,283 ZIP codes nationally. Within OR, it ranks 137 of 463.
Learn more
Two guides worth reading on 97466: the frost range, on how to read the range around Powers's dates instead of trusting one, and local microclimates, on what one yard in Powers can differ from the 97466 normal.