Dayton, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dayton, a city in Columbia County, Washington.
Today
88°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 88. North wind 1 to 9 mph.
7-day forecast for Dayton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Areas Of Smoke | 1 to 9 mph N | 0% |
| Tonight | 54°F | Patchy Smoke | 2 to 6 mph E | 0% |
| Wednesday | 96°F | Patchy Smoke | 5 mph N | 0% |
| Wednesday Night | 58°F | Patchy Smoke then Clear | 3 mph SE | 0% |
| Thursday | 100°F | Sunny | 5 mph SW | 0% |
| Thursday Night | 63°F | Clear | 2 to 8 mph SW | 0% |
| Friday | 97°F | Sunny | 8 to 15 mph SW | 0% |
| Friday Night | 62°F | Clear | 5 to 9 mph SW | 0% |
| Saturday | 94°F | Sunny | 5 to 12 mph SW | 0% |
| Saturday Night | 59°F | Mostly Clear | 5 to 9 mph SW | 0% |
| Sunday | 88°F | Sunny | 7 to 13 mph SW | 0% |
| Sunday Night | 56°F | Mostly Clear | 5 to 8 mph SW | 0% |
| Monday | 87°F | Sunny | 6 to 9 mph SW | 0% |
| Monday Night | 55°F | Clear | 6 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Dayton (46.317, -117.977). Updated through the day.
Growing snapshot for Dayton
Last spring frost
Apr 28
First fall frost
Oct 13
Growing season
168 days
Hardiness zone
7a
More local growing data for Dayton: nearby ZIP 99328 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Dayton 1 Wsw, Wa (6.8 mi from Dayton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.