White Salmon, WA 98623 Frost Dates
Frost dates for White Salmon, WA, ZIP 98623
The last spring frost here typically falls around 04/20, about 235 days from today. The first fall frost typically arrives around 10/13, about 177 frost-free days later.
White Salmon sits in USDA Zone 8a (10 to 15°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 8a around White Salmon has about 7 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 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Plant by 03/29 and you're betting against frost in roughly 9 years out of 10. 05/09 is the safer bet, historically only a 1-in-10 chance of frost that late.
How White Salmon compares
White Salmon's growing season runs about 177 days, ranking 26,127 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 462 of 700.
Learn more
the frost range explains how to read the range around White Salmon's dates instead of trusting one, and local microclimates explains what one yard in White Salmon can differ from the 98623 normal.