Kent, WA 98031 Frost Dates
Kent, WA: when does the frost end?
Typically, the last spring freeze lands around 03/20, roughly 204 days out. Fall's first freeze usually shows up around 11/10, roughly 233 days after the last spring frost.
Kent 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 11 weeks until Kent's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 03/20 isn't a guarantee
03/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/27 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/08 and only about 1 year in 10 sees frost after that.
Kent against the rest of the dataset
About 233 days separate Kent's last and first frost, putting it 9,841 of 40,283 ZIP codes nationally. Within WA, it ranks 172 of 700.
Learn more
Before leaning on 98031's figures: zone vs. frost date explains why Zone 8b and Kent's frost date answer different questions, while the frost range explains how to read the range around Kent's dates instead of trusting one.