Granger, WA 98938 Frost Dates
Granger, WA: when does the frost end?
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/08, roughly 160 days after the last spring frost.
Granger sits in USDA Zone 7b (5 to 10°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 6 weeks until Granger's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Granger's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/13 and only about 1 year in 10 sees frost after that.
Granger against the rest of the dataset
At roughly 160 frost-free days, Granger places 32,311 of 40,283 ZIP codes in this dataset. Within WA, it ranks 569 of 700.
Learn more
Before leaning on 98938's figures: the frost range explains how to read the range around Granger's dates instead of trusting one, while local microclimates explains what one yard in Granger can differ from the 98938 normal.