Napavine, WA 98565 Frost Dates
98565, near Napavine, WA: the frost window
Typically, the last spring freeze lands around 04/05, roughly 220 days out. Fall's first freeze usually shows up around 10/25, roughly 196 days after the last spring frost.
Zone 8a (10 to 15°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 Napavine, not a forecast for this year.
Stretching the season past the first frost
Napavine's growing season runs out in roughly 8 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
04/05 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/04 and only about 1 year in 10 sees frost after that.
Napavine against the rest of the dataset
About 196 days separate Napavine's last and first frost, putting it 18,998 of 40,283 ZIP codes nationally. Within WA, it ranks 351 of 700.
Learn more
Two guides worth reading on 98565: local microclimates, on what one yard in Napavine can differ from the 98565 normal, and zone vs. frost date, on why Zone 8a and Napavine's frost date answer different questions.