Normandy Park, WA 98070 Frost Dates
98070, near Normandy Park, WA: the frost window
Typically, the last spring freeze lands around 03/02, roughly 186 days out. Fall's first freeze usually shows up around 11/23, roughly 266 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 Normandy Park, not a forecast for this year.
Stretching the season past the first frost
Normandy 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
03/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 02/05 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 03/23 and only about 1 year in 10 sees frost after that.
Normandy Park against the rest of the dataset
At roughly 266 frost-free days, Normandy Park places 5,932 of 40,283 ZIP codes in this dataset. Within WA, it ranks 20 of 700.
Learn more
Two guides worth reading on 98070: local microclimates, on what one yard in Normandy Park can differ from the 98070 normal, and zone vs. frost date, on why Zone 9a and Normandy Park's frost date answer different questions.