Snoqualmie, WA 98065 Frost Dates
Frost dates for Snoqualmie, WA, ZIP 98065
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.
Snoqualmie 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
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.
Why 03/30 isn't a guarantee
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
About 223 days separate Snoqualmie's last and first frost, putting it 12,040 of 40,283 ZIP codes nationally. Within WA, it ranks 233 of 700.
Learn more
the frost range explains how to read the range around Snoqualmie's dates instead of trusting one, and local microclimates explains what one yard in Snoqualmie can differ from the 98065 normal.