Beaverton, OR 97006 Frost Dates
Beaverton, OR: when does the frost end?
Typically, the last spring freeze lands around 02/11, roughly 167 days out. Fall's first freeze usually shows up around 12/05, roughly 303 days after the last spring frost.
Beaverton 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 14 weeks until Beaverton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Beaverton's last frost
02/11 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 12/26 and only about 1 year in 10 sees frost after that.
Beaverton against the rest of the dataset
At roughly 303 frost-free days, Beaverton places 3,770 of 40,283 ZIP codes in this dataset. Within OR, it ranks 17 of 463.
Learn more
Before leaning on 97006's figures: local microclimates explains what one yard in Beaverton can differ from the 97006 normal, while zone vs. frost date explains why Zone 8b and Beaverton's frost date answer different questions.