Millwood, WA 99213 Frost Dates
Millwood, WA: when does the frost end?
Typically, the last spring freeze lands around 04/26, roughly 241 days out. Fall's first freeze usually shows up around 10/15, roughly 170 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Millwood in Zone 7a (0 to 5°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 7 weeks until Millwood's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Millwood's last frost
04/26 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Millwood against the rest of the dataset
Millwood's growing season runs about 170 days, ranking 29,062 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 502 of 700.
Learn more
Before leaning on 99213's figures: the frost range explains how to read the range around Millwood's dates instead of trusting one, while local microclimates explains what one yard in Millwood can differ from the 99213 normal.