Mattawa, WA Weather & Growing Conditions
Today
80°F
Sunny
Sunny, with a high near 80. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 3 mph SE | 0% |
| Tonight | 54°F | Mostly Clear | 2 mph NE | 0% |
| Sunday | 82°F | Sunny | 2 mph NE | 0% |
| Sunday Night | 55°F | Clear | 2 mph W | 0% |
| Monday | 85°F | Sunny | 2 mph SW | 0% |
| Monday Night | 56°F | Partly Cloudy | 5 mph W | 0% |
| Tuesday | 80°F | Mostly Sunny | 3 mph NW | 0% |
| Tuesday Night | 54°F | Partly Cloudy | 3 to 7 mph W | 0% |
| Wednesday | 75°F | Mostly Sunny | 5 mph W | 1% |
| Wednesday Night | 52°F | Partly Cloudy | 6 mph W | 1% |
| Thursday | 72°F | Mostly Sunny | 5 mph NW | 2% |
| Thursday Night | 52°F | Partly Cloudy | 5 mph NW | 7% |
| Friday | 70°F | Mostly Sunny | 6 mph NW | 7% |
| Friday Night | 49°F | Partly Cloudy | 6 mph NW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mattawa, WA
Last spring frost
Apr 23
First fall frost
Oct 12
Growing season
172 days
Hardiness zone
7a
Explore more for Mattawa, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Smyrna, Wa (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.