Banks, OR 97117 Frost Dates
Banks, OR: when does the frost end?
Typically, the last spring freeze lands around 04/16, roughly 231 days out. Fall's first freeze usually shows up around 10/26, roughly 192 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Banks in Zone 8b (15 to 20°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
With roughly 8 weeks until Banks's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Banks's last frost
04/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/26 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/05 and only about 1 year in 10 sees frost after that.
Banks against the rest of the dataset
Banks's growing season runs about 192 days, ranking 20,397 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 274 of 463.
Learn more
Before leaning on 97117's figures: the frost range explains how to read the range around Banks's dates instead of trusting one, while local microclimates explains what one yard in Banks can differ from the 97117 normal.