Chehalis, WA 98532 Frost Dates
Frost dates for Chehalis, WA, ZIP 98532
The last spring frost here typically falls around 04/22, about 237 days from today. The first fall frost typically arrives around 10/27, about 188 frost-free days later.
The USDA Plant Hardiness Zone Map puts Chehalis in Zone 8a (10 to 15°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 8a around Chehalis has about 9 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 03/30 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Chehalis compares
Chehalis's growing season runs about 188 days, ranking 21,960 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 414 of 700.
Learn more
zone vs. frost date explains why Zone 8a and Chehalis's frost date answer different questions, and the frost range explains how to read the range around Chehalis's dates instead of trusting one.