Banks, OR 97109 Frost Dates
Frost dates for Banks, OR, ZIP 97109
The last spring frost here typically falls around 05/08, about 253 days from today. The first fall frost typically arrives around 10/01, about 144 frost-free days later.
Banks sits in USDA Zone 8b (15 to 20°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.
What to do before the first frost
Zone 8b around Banks has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/08 isn't a guarantee
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/18 and you're betting against frost in roughly 9 years out of 10. 05/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Banks compares
Banks's growing season runs about 144 days, ranking 36,381 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 367 of 463.
Learn more
the frost range explains how to read the range around Banks's dates instead of trusting one, and local microclimates explains what one yard in Banks can differ from the 97109 normal.