Kenmore, WA 98028 Frost Dates
When can you plant in Kenmore, WA?
Around 03/08 is the usual last spring frost, about 192 days away. The first fall frost typically arrives around 11/23, about 259 frost-free days later.
Kenmore 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.
What to do before the first frost
About 12 weeks of growing season left in Kenmore 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 Kenmore compares
About 259 days separate Kenmore's last and first frost, putting it 6,557 of 40,283 ZIP codes nationally. Within WA, it ranks 43 of 700.
Learn more
zone vs. frost date covers why Zone 9a and Kenmore's frost date answer different questions. the frost range covers how to read the range around Kenmore's dates instead of trusting one.