Boardman, OR 99345 Frost Dates
Boardman, OR: when does the frost end?
The last spring frost here typically falls around 04/14, about 229 days from today. Fall's first freeze usually shows up around 10/21, roughly 188 days after the last spring frost.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Boardman, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Boardman'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
04/14 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/28 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.
Boardman against the rest of the dataset
Boardman's growing season runs about 188 days, ranking 22,018 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 290 of 463.
Learn more
Before leaning on 99345's figures: the frost range explains how to read the range around Boardman's dates instead of trusting one, while local microclimates explains what one yard in Boardman can differ from the 99345 normal.