North Plains, OR 97133 Frost Dates
North Plains, OR: when does the frost end?
The last spring frost here typically falls around 04/16, about 231 days from today. Fall's first freeze usually shows up around 10/26, roughly 192 days after the last spring frost.
North Plains 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 8 weeks until North Plains's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around North Plains'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.
North Plains against the rest of the dataset
North Plains's growing season runs about 192 days, ranking 20,331 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 272 of 463.
Learn more
Before leaning on 97133's figures: the frost range explains how to read the range around North Plains's dates instead of trusting one, while local microclimates explains what one yard in North Plains can differ from the 97133 normal.