Washougal, WA 97293 Frost Dates
Washougal, WA: when does the frost end?
Typically, the last spring freeze lands around 03/16, roughly 200 days out. Fall's first freeze usually shows up around 11/20, roughly 250 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 Washougal, not a forecast for this year.
Stretching the season past the first frost
With roughly 12 weeks until Washougal's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Washougal's last frost
03/16 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 04/12 and only about 1 year in 10 sees frost after that.
Washougal against the rest of the dataset
About 250 days separate Washougal's last and first frost, putting it 7,495 of 40,283 ZIP codes nationally. Within WA, it ranks 115 of 700.
Learn more
Before leaning on 97293's figures: zone vs. frost date explains why Zone 9a and Washougal's frost date answer different questions, while the frost range explains how to read the range around Washougal's dates instead of trusting one.