Lake Forest Park, WA 98155 Frost Dates
Frost dates for Lake Forest Park, WA, ZIP 98155
Typically, the last spring freeze lands around 03/08, roughly 192 days out. The first fall frost typically arrives around 11/23, about 259 frost-free days later.
Lake Forest Park 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
Zone 9a around Lake Forest Park has about 12 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.
The actual range around Lake Forest Park's last frost
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 Lake Forest Park compares
About 259 days separate Lake Forest Park's last and first frost, putting it 6,570 of 40,283 ZIP codes nationally. Within WA, it ranks 45 of 700.
Learn more
zone vs. frost date explains why Zone 9a and Lake Forest Park's frost date answer different questions, and the frost range explains how to read the range around Lake Forest Park's dates instead of trusting one.