Bellevue, WA 98008 Frost Dates
98008, near Bellevue, WA: the frost window
Typically, the last spring freeze lands around 03/08, roughly 192 days out. Fall's first freeze usually shows up around 11/23, roughly 259 days after the last spring frost.
Bellevue 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
Bellevue's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Bellevue's last frost
03/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/29 and only about 1 year in 10 sees frost after that.
Bellevue against the rest of the dataset
At roughly 259 frost-free days, Bellevue places 6,528 of 40,283 ZIP codes in this dataset. Within WA, it ranks 31 of 700.
Learn more
Two guides worth reading on 98008: the frost range, on how to read the range around Bellevue's dates instead of trusting one, and local microclimates, on what one yard in Bellevue can differ from the 98008 normal.