Snoqualmie, WA 98024 Frost Dates
98024, near Snoqualmie, WA: the frost window
The last spring frost here typically falls around 03/30, about 214 days from today. Fall's first freeze usually shows up around 11/07, roughly 223 days after the last spring frost.
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.
Stretching the season past the first frost
Snoqualmie's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Snoqualmie's last frost
03/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Snoqualmie against the rest of the dataset
At roughly 223 frost-free days, Snoqualmie places 12,038 of 40,283 ZIP codes in this dataset. Within WA, it ranks 231 of 700.
Learn more
Two guides worth reading on 98024: local microclimates, on what one yard in Snoqualmie can differ from the 98024 normal, and zone vs. frost date, on why Zone 8b and Snoqualmie's frost date answer different questions.