Lynden, WA 98264 Frost Dates
Lynden, WA: 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 10/30, roughly 211 days after the last spring frost.
Zone 8a (10 to 15°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 Lynden, not a forecast for this year.
Stretching the season past the first frost
With roughly 9 weeks until Lynden's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lynden's last frost
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/10 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Lynden against the rest of the dataset
About 211 days separate Lynden's last and first frost, putting it 14,732 of 40,283 ZIP codes nationally. Within WA, it ranks 265 of 700.
Learn more
Before leaning on 98264's figures: the frost range explains how to read the range around Lynden's dates instead of trusting one, while local microclimates explains what one yard in Lynden can differ from the 98264 normal.