Snoqualmie, WA 98050 Frost Dates
Frost dates for Snoqualmie, WA, ZIP 98050
Around 03/30 is the usual last spring frost, about 214 days away. The first fall frost typically arrives around 11/07, about 223 frost-free days later.
The USDA Plant Hardiness Zone Map puts Snoqualmie in Zone 8b (15 to 20°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 8b around Snoqualmie has about 10 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
03/30 is the middle of 30 years of NOAA records, not a promise. Plant by 03/04 and you're betting against frost in roughly 9 years out of 10. 04/21 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Snoqualmie compares
At roughly 223 frost-free days, Snoqualmie places 12,039 of 40,283 ZIP codes in this dataset. Within WA, it ranks 232 of 700.
Learn more
local microclimates explains what one yard in Snoqualmie can differ from the 98050 normal, and zone vs. frost date explains why Zone 8b and Snoqualmie's frost date answer different questions.