Montesano, WA 98563 Frost Dates
98563, near Montesano, 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 10/14, roughly 169 days after the last spring frost.
Montesano sits in USDA Zone 8b (15 to 20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
Montesano's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Montesano's last frost
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/19 and only about 1 year in 10 sees frost after that.
Montesano against the rest of the dataset
Montesano's growing season runs about 169 days, ranking 29,421 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 523 of 700.
Learn more
Two guides worth reading on 98563: local microclimates, on what one yard in Montesano can differ from the 98563 normal, and zone vs. frost date, on why Zone 8b and Montesano's frost date answer different questions.