Yakima, WA 98903 Frost Dates
Yakima, WA: when does the frost end?
Typically, the last spring freeze lands around 04/08, roughly 223 days out. Fall's first freeze usually shows up around 10/23, roughly 196 days after the last spring frost.
Yakima 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 Yakima's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Yakima's last frost
04/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/23 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/28 and only about 1 year in 10 sees frost after that.
Yakima against the rest of the dataset
About 196 days separate Yakima's last and first frost, putting it 18,902 of 40,283 ZIP codes nationally. Within WA, it ranks 341 of 700.
Learn more
Before leaning on 98903's figures: the frost range explains how to read the range around Yakima's dates instead of trusting one, while local microclimates explains what one yard in Yakima can differ from the 98903 normal.