Poulsbo, WA 98365 Frost Dates
98365, near Poulsbo, WA: the frost window
Typically, the last spring freeze lands around 03/01, roughly 185 days out. Fall's first freeze usually shows up around 11/28, roughly 274 days after the last spring frost.
Poulsbo 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
Poulsbo's growing season runs out in roughly 13 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 03/01 isn't a guarantee
03/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/03 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/23 and only about 1 year in 10 sees frost after that.
Poulsbo against the rest of the dataset
About 274 days separate Poulsbo's last and first frost, putting it 5,148 of 40,283 ZIP codes nationally. Within WA, it ranks 10 of 700.
Learn more
Two guides worth reading on 98365: zone vs. frost date, on why Zone 8b and Poulsbo's frost date answer different questions, and the frost range, on how to read the range around Poulsbo's dates instead of trusting one.