Sutherlin, OR 97486 Frost Dates
Sutherlin, OR: when does the frost end?
Typically, the last spring freeze lands around 03/31, roughly 215 days out. Fall's first freeze usually shows up around 11/05, roughly 215 days after the last spring frost.
Zone 9a (20 to 25°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 Sutherlin, not a forecast for this year.
Stretching the season past the first frost
With roughly 10 weeks until Sutherlin's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Sutherlin's last frost
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.
Sutherlin against the rest of the dataset
About 215 days separate Sutherlin's last and first frost, putting it 14,061 of 40,283 ZIP codes nationally. Within OR, it ranks 188 of 463.
Learn more
Before leaning on 97486's figures: local microclimates explains what one yard in Sutherlin can differ from the 97486 normal, while zone vs. frost date explains why Zone 9a and Sutherlin's frost date answer different questions.