Sherwood, OR 97140 Frost Dates
Sherwood, OR: when does the frost end?
The last spring frost here typically falls around 03/21, about 205 days from today. Fall's first freeze usually shows up around 11/22, roughly 241 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Sherwood 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 12 weeks until Sherwood's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
03/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/19 and only about 1 year in 10 sees frost after that.
Sherwood against the rest of the dataset
Sherwood's growing season runs about 241 days, ranking 8,523 of 40,283 US ZIP codes measured here, longest to shortest. Within OR, it ranks 121 of 463.
Learn more
Before leaning on 97140's figures: local microclimates explains what one yard in Sherwood can differ from the 97140 normal, while zone vs. frost date explains why Zone 8b and Sherwood's frost date answer different questions.