Mattawa has some of Washington’s warmest summers
Mattawa has chilly winters and warm summers, with very little rain. A typical July afternoon reaches 91°, a January night drops to 26°. Normal November highs come to 49°, and lows to 32°.
Getting the latest forecast from the National Weather Service…
What stands out about Mattawa’s weather
Read from 30 years of NOAA records. Each one opens the full story on the Climate page.
Where today sits in Mattawa’s year
Typical highs and lows month by month, from 30 years of NOAA records.
Weather talk
Road reports, first frosts and storm memories from neighbors in Mattawa.
Your answer becomes a post in Town Square.
Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Mattawa itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Priest Rapids Dam, WA (6 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.