Port Orchard, WA 98366 Frost Dates
Port Orchard, 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.
Port Orchard 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 Port Orchard's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
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.
Port Orchard against the rest of the dataset
About 227 days separate Port Orchard's last and first frost, putting it 10,970 of 40,283 ZIP codes nationally. Within WA, it ranks 193 of 700.
Learn more
Before leaning on 98366's figures: zone vs. frost date explains why Zone 9a and Port Orchard's frost date answer different questions, while the frost range explains how to read the range around Port Orchard's dates instead of trusting one.