Poulsbo, WA 98392 Frost Dates
Poulsbo, WA: when does the frost end?
Around 03/29 is the usual last spring frost, about 213 days away. Fall's first freeze usually shows up around 11/14, roughly 227 days after the last spring frost.
Poulsbo sits in USDA Zone 9a (20 to 25°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 11 weeks until Poulsbo's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/29 isn't a guarantee
03/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/24 and only about 1 year in 10 sees frost after that.
Poulsbo against the rest of the dataset
At roughly 227 frost-free days, Poulsbo places 10,986 of 40,283 ZIP codes in this dataset. Within WA, it ranks 206 of 700.
Learn more
Before leaning on 98392's figures: local microclimates explains what one yard in Poulsbo can differ from the 98392 normal, while zone vs. frost date explains why Zone 9a and Poulsbo's frost date answer different questions.