Washtucna, WA 99371 Frost Dates
Washtucna, WA: when does the frost end?
Typically, the last spring freeze lands around 04/25, roughly 240 days out. Fall's first freeze usually shows up around 10/15, roughly 173 days after the last spring frost.
Washtucna 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 7 weeks until Washtucna's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/25 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/04 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Washtucna against the rest of the dataset
At roughly 173 frost-free days, Washtucna places 28,087 of 40,283 ZIP codes in this dataset. Within WA, it ranks 484 of 700.
Learn more
Before leaning on 99371's figures: zone vs. frost date explains why Zone 7a and Washtucna's frost date answer different questions, while the frost range explains how to read the range around Washtucna's dates instead of trusting one.