Waitsburg, WA 99361 Frost Dates
When can you plant in Waitsburg, WA?
The last spring frost here typically falls around 03/27, about 211 days from today. The first fall frost typically arrives around 10/31, about 219 frost-free days later.
The USDA Plant Hardiness Zone Map puts Waitsburg in Zone 7a (0 to 5°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 9 weeks of growing season left in Waitsburg before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
03/27 is the middle of 30 years of NOAA records, not a promise. Plant by 03/03 and you're betting against frost in roughly 9 years out of 10. 04/22 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Waitsburg compares
Waitsburg's growing season runs about 219 days, ranking 13,066 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 245 of 700.
Learn more
zone vs. frost date covers why Zone 7a and Waitsburg's frost date answer different questions. the frost range covers how to read the range around Waitsburg's dates instead of trusting one.