Waitsburg, WA 99329 Frost Dates
When can you plant in Waitsburg, WA?
Typically, the last spring freeze lands around 03/27, roughly 211 days out. The first fall frost typically arrives around 10/31, about 219 frost-free days later.
Waitsburg sits in USDA Zone 7a (0 to 5°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.
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.
Why 03/27 isn't a guarantee
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
About 219 days separate Waitsburg's last and first frost, putting it 13,065 of 40,283 ZIP codes nationally. Within WA, it ranks 244 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.