Oakland, OR 97479 Frost Dates
Oakland, OR: when does the frost end?
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/05, roughly 215 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Oakland in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 10 weeks until Oakland's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/31 isn't a guarantee
03/31 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 04/26 and only about 1 year in 10 sees frost after that.
Oakland against the rest of the dataset
Oakland's growing season runs about 215 days, ranking 14,140 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 192 of 463.
Learn more
Before leaning on 97479's figures: zone vs. frost date explains why Zone 8b and Oakland's frost date answer different questions, while the frost range explains how to read the range around Oakland's dates instead of trusting one.