Roseburg, OR 97470 Frost Dates
Roseburg, OR: when does the frost end?
The last spring frost here typically falls around 03/19, about 203 days from today. Fall's first freeze usually shows up around 11/20, roughly 245 days after the last spring frost.
Roseburg 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 12 weeks until Roseburg's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Roseburg's last frost
03/19 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/13 and only about 1 year in 10 sees frost after that.
Roseburg against the rest of the dataset
Roseburg's growing season runs about 245 days, ranking 7,987 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 106 of 463.
Learn more
Before leaning on 97470's figures: the frost range explains how to read the range around Roseburg's dates instead of trusting one, while local microclimates explains what one yard in Roseburg can differ from the 97470 normal.