Mabton, WA 98935 Frost Dates
98935, near Mabton, WA: the frost window
Typically, the last spring freeze lands around 05/01, roughly 246 days out. Fall's first freeze usually shows up around 10/06, roughly 157 days after the last spring frost.
Zone 7a (0 to 5°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 Mabton, not a forecast for this year.
Stretching the season past the first frost
Mabton's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/16 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/18 and only about 1 year in 10 sees frost after that.
Mabton against the rest of the dataset
About 157 days separate Mabton's last and first frost, putting it 33,340 of 40,283 ZIP codes nationally. Within WA, it ranks 581 of 700.
Learn more
Two guides worth reading on 98935: the frost range, on how to read the range around Mabton's dates instead of trusting one, and local microclimates, on what one yard in Mabton can differ from the 98935 normal.