Mattawa, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mattawa, a city in Kittitas County, Washington.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. Southeast wind around 5 mph.
7-day forecast for Mattawa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 5 mph SE | 0% |
| Tonight | 57°F | Mostly Clear | 3 mph N | 0% |
| Sunday | 83°F | Sunny | 3 mph NE | 0% |
| Sunday Night | 57°F | Mostly Clear | 2 mph NW | 0% |
| Monday | 85°F | Sunny | 5 mph NE | 0% |
| Monday Night | 58°F | Partly Cloudy | 6 mph W | 0% |
| Tuesday | 81°F | Mostly Sunny | 5 to 8 mph NW | 0% |
| Tuesday Night | 54°F | Partly Cloudy | 7 to 10 mph W | 0% |
| Wednesday | 75°F | Mostly Sunny | 7 mph W | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 7 mph W | 0% |
| Thursday | 71°F | Mostly Sunny | 5 mph N | 4% |
| Thursday Night | 53°F | Partly Cloudy | 3 mph NW | 8% |
| Friday | 69°F | Mostly Sunny | 3 to 7 mph NW | 8% |
| Friday Night | 50°F | Partly Cloudy | 3 to 7 mph W | 7% |
Forecast source: National Weather Service (api.weather.gov) for Mattawa (46.736, -119.905). Updated through the day.
Growing snapshot for Mattawa
Last spring frost
Mar 24
First fall frost
Nov 4
Growing season
222 days
Hardiness zone
7a
More local growing data for Mattawa: nearby ZIP 98950 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Priest Rapids Dam, Wa (12.1 mi from Mattawa). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.