Ellensburg, WA 98926 Frost Dates
Ellensburg, WA: when does the frost end?
Typically, the last spring freeze lands around 04/28, roughly 243 days out. Fall's first freeze usually shows up around 10/07, roughly 163 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Ellensburg in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 6 weeks until Ellensburg'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
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Ellensburg against the rest of the dataset
At roughly 163 frost-free days, Ellensburg places 31,333 of 40,283 ZIP codes in this dataset. Within WA, it ranks 559 of 700.
Learn more
Before leaning on 98926's figures: the frost range explains how to read the range around Ellensburg's dates instead of trusting one, while local microclimates explains what one yard in Ellensburg can differ from the 98926 normal.