Asotin, WA 99401 Frost Dates
Asotin, WA: when does the frost end?
The last spring frost here typically falls around 04/06, about 221 days from today. Fall's first freeze usually shows up around 10/26, roughly 200 days after the last spring frost.
Asotin sits in USDA Zone 7a (0 to 5°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
With roughly 8 weeks until Asotin's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Asotin's last frost
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/26 and only about 1 year in 10 sees frost after that.
Asotin against the rest of the dataset
At roughly 200 frost-free days, Asotin places 17,845 of 40,283 ZIP codes in this dataset. Within WA, it ranks 327 of 700.
Learn more
Before leaning on 99401's figures: zone vs. frost date explains why Zone 7a and Asotin's frost date answer different questions, while the frost range explains how to read the range around Asotin's dates instead of trusting one.