Starbuck, WA 99359 Frost Dates
Frost dates for Starbuck, WA, ZIP 99359
Around 05/13 is the usual last spring frost, about 258 days away. The first fall frost typically arrives around 09/26, about 133 frost-free days later.
The USDA Plant Hardiness Zone Map puts Starbuck in Zone 7b (5 to 10°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
Zone 7b around Starbuck has about 4 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/13 isn't a guarantee
05/13 is the middle of 30 years of NOAA records, not a promise. Plant by 04/28 and you're betting against frost in roughly 9 years out of 10. 06/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Starbuck compares
About 133 days separate Starbuck's last and first frost, putting it 38,148 of 40,283 ZIP codes nationally. Within WA, it ranks 636 of 700.
Learn more
zone vs. frost date explains why Zone 7b and Starbuck's frost date answer different questions, and the frost range explains how to read the range around Starbuck's dates instead of trusting one.