Harrah, WA 98952 Frost Dates
Harrah, WA: when does the frost end?
The last spring frost here typically falls around 05/08, about 253 days from today. Fall's first freeze usually shows up around 10/04, roughly 149 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Harrah 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 5 weeks until Harrah'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
05/08 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/24 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/27 and only about 1 year in 10 sees frost after that.
Harrah against the rest of the dataset
At roughly 149 frost-free days, Harrah places 35,554 of 40,283 ZIP codes in this dataset. Within WA, it ranks 607 of 700.
Learn more
Before leaning on 98952's figures: zone vs. frost date explains why Zone 7a and Harrah's frost date answer different questions, while the frost range explains how to read the range around Harrah's dates instead of trusting one.