Kalama, WA 98625 Frost Dates
98625, near Kalama, WA: the frost window
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 11/05, roughly 210 days after the last spring frost.
Kalama 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
Kalama's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/08 isn't a guarantee
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/11 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/02 and only about 1 year in 10 sees frost after that.
Kalama against the rest of the dataset
At roughly 210 frost-free days, Kalama places 15,017 of 40,283 ZIP codes in this dataset. Within WA, it ranks 274 of 700.
Learn more
Two guides worth reading on 98625: the frost range, on how to read the range around Kalama's dates instead of trusting one, and local microclimates, on what one yard in Kalama can differ from the 98625 normal.