Centralia, WA 98531 Frost Dates
Centralia, WA: when does the frost end?
Around 04/22 is the usual last spring frost, about 237 days away. Fall's first freeze usually shows up around 10/27, roughly 188 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Centralia in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 9 weeks until Centralia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Centralia against the rest of the dataset
At roughly 188 frost-free days, Centralia places 21,878 of 40,283 ZIP codes in this dataset. Within WA, it ranks 407 of 700.
Learn more
Before leaning on 98531's figures: the frost range explains how to read the range around Centralia's dates instead of trusting one, while local microclimates explains what one yard in Centralia can differ from the 98531 normal.