Colville, WA 99167 Frost Dates
Frost dates for Colville, WA, ZIP 99167
The last spring frost here typically falls around 05/02, about 247 days from today. The first fall frost typically arrives around 10/02, about 153 frost-free days later.
Colville 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.
What to do before the first frost
Zone 6b around Colville has about 5 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.
The actual range around Colville's last frost
05/02 is the middle of 30 years of NOAA records, not a promise. Plant by 04/19 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Colville compares
Colville's growing season runs about 153 days, ranking 34,529 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 589 of 700.
Learn more
the frost range explains how to read the range around Colville's dates instead of trusting one, and local microclimates explains what one yard in Colville can differ from the 99167 normal.