Blaine, WA 98281 Frost Dates
Blaine, WA: when does the frost end?
Around 03/31 is the usual last spring frost, about 215 days away. Fall's first freeze usually shows up around 11/04, roughly 219 days after the last spring frost.
Blaine 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 10 weeks until Blaine's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/31 isn't a guarantee
03/31 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/22 and only about 1 year in 10 sees frost after that.
Blaine against the rest of the dataset
Blaine's growing season runs about 219 days, ranking 13,006 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 242 of 700.
Learn more
Before leaning on 98281's figures: the frost range explains how to read the range around Blaine's dates instead of trusting one, while local microclimates explains what one yard in Blaine can differ from the 98281 normal.