Woodburn, OR 97071 Frost Dates
Woodburn, OR: when does the frost end?
The last spring frost here typically falls around 03/16, about 200 days from today. Fall's first freeze usually shows up around 11/14, roughly 242 days after the last spring frost.
Woodburn 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 11 weeks until Woodburn's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/16 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/21 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/07 and only about 1 year in 10 sees frost after that.
Woodburn against the rest of the dataset
Woodburn's growing season runs about 242 days, ranking 8,349 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 108 of 463.
Learn more
Before leaning on 97071's figures: zone vs. frost date explains why Zone 8b and Woodburn's frost date answer different questions, while the frost range explains how to read the range around Woodburn's dates instead of trusting one.