Deer Park, WA 99006 Frost Dates
Deer Park, WA: when does the frost end?
Around 05/22 is the usual last spring frost, about 267 days away. Fall's first freeze usually shows up around 09/14, roughly 112 days after the last spring frost.
Deer Park sits in USDA Zone 6b (-5 to 0°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 2 weeks until Deer Park'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
05/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/02 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/15 and only about 1 year in 10 sees frost after that.
Deer Park against the rest of the dataset
Deer Park's growing season runs about 112 days, ranking 39,419 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 667 of 700.
Learn more
Before leaning on 99006's figures: the frost range explains how to read the range around Deer Park's dates instead of trusting one, while local microclimates explains what one yard in Deer Park can differ from the 99006 normal.