Lake Forest Park, WA 98125 Frost Dates
98125, near Lake Forest Park, WA: the frost window
Typically, the last spring freeze lands around 03/08, roughly 192 days out. Fall's first freeze usually shows up around 11/23, roughly 259 days after the last spring frost.
Zone 9a (20 to 25°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Lake Forest Park, not a forecast for this year.
Stretching the season past the first frost
Lake Forest Park's growing season runs out in roughly 12 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
03/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/29 and only about 1 year in 10 sees frost after that.
Lake Forest Park against the rest of the dataset
Lake Forest Park's growing season runs about 259 days, ranking 6,569 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 44 of 700.
Learn more
Two guides worth reading on 98125: zone vs. frost date, on why Zone 9a and Lake Forest Park's frost date answer different questions, and the frost range, on how to read the range around Lake Forest Park's dates instead of trusting one.