Bellevue, WA 98007 Frost Dates
When can you plant in Bellevue, WA?
Typically, the last spring freeze lands around 03/08, roughly 192 days out. The first fall frost typically arrives around 11/23, about 259 frost-free days later.
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.
What to do before the first frost
About 12 weeks of growing season left in Bellevue before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/08 isn't a guarantee
03/08 is the middle of 30 years of NOAA records, not a promise. Plant by 02/13 and you're betting against frost in roughly 9 years out of 10. 03/29 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bellevue compares
Bellevue's growing season runs about 259 days, ranking 6,527 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 30 of 700.
Learn more
zone vs. frost date covers why Zone 8b and Bellevue's frost date answer different questions. the frost range covers how to read the range around Bellevue's dates instead of trusting one.