Scappoose, OR 97056 Frost Dates
Scappoose, OR: when does the frost end?
Typically, the last spring freeze lands around 04/10, roughly 225 days out. Fall's first freeze usually shows up around 11/02, roughly 209 days after the last spring frost.
Scappoose 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.
Stretching the season past the first frost
With roughly 9 weeks until Scappoose's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/10 isn't a guarantee
04/10 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/17 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.
Scappoose against the rest of the dataset
About 209 days separate Scappoose's last and first frost, putting it 15,179 of 40,283 ZIP codes nationally. Within OR, it ranks 210 of 463.
Learn more
Before leaning on 97056's figures: zone vs. frost date explains why Zone 8b and Scappoose's frost date answer different questions, while the frost range explains how to read the range around Scappoose's dates instead of trusting one.