Deer Park, WA 99110 Frost Dates
Deer Park, WA: when does the frost end?
The last spring frost here typically falls around 05/22, about 267 days from today. Fall's first freeze usually shows up around 09/14, roughly 112 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Deer Park in Zone 6a (-10 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 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
At roughly 112 frost-free days, Deer Park places 39,421 of 40,283 ZIP codes in this dataset. Within WA, it ranks 669 of 700.
Learn more
Before leaning on 99110's figures: local microclimates explains what one yard in Deer Park can differ from the 99110 normal, while zone vs. frost date explains why Zone 6a and Deer Park's frost date answer different questions.