An Air Quality Alert has been issued by the following agencies: Washington Department of Ecology Colville Confederated Tribes Environmental Protection Agency Spokane Regional Clean Air Agency An Air Quality Alert has been issued for Adams, Asotin, Chelan, Douglas, Ferry, Garfield, Grant, Lincoln, Okanogan, Pend Oreille, Spokane, Stevens, and Whitman Counties until further notice due to current and expected smoke from regional fires. Particulate matter (PM2.5) may reach Very Unhealthy levels for areas directly downwind from active wildfires. Other areas may reach Unhealthy for Sensitive Groups or worse. Intermittent clearing may occur due to windy conditions, but smoke production continues to be significant. When air quality is Unhealthy, everyone should reduce exposure. Limit time outside, avoid strenuous outdoor activity, and follow tips for cleaner indoor air. When air quality is Very Unhealthy, everyone should reduce exposure. Stay inside and filter indoor air to keep it cleaner. Go elsewhere for cleaner air, if needed.
Weather in Mattawa, WA
Updated 2026-08-11 10:45 local time · ZIP codes 99349

Sunny
Active alerts
Next hours
78°0% rain
84°0% rain
86°0% rain
86°0% rain
87°0% rain
88°0% rain
87°0% rain
84°0% rain
79°1% rain
75°1% rain
72°1% rain
74°1% rain3-day weather forecast



Weather details
Sunrise, sunset and moon
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 1%).
It feels like 77°F with winds near 4 mph.
75°F, 1% rain chance and 13 mph wind.
Visibility is around 4 mi; gusts may reach 23 mph.
Current temperature is 78°F, wind 4 mph, rain chance up to 1%.
UV index is 3. Sunscreen and sunglasses are sensible for longer outdoor time.
Mattawa weather today
Sunny and 78°F in Mattawa, WA. Today's high is 88°F with a 1% rain chance. Winds are around 4 mph with gusts near 5 mph. Relative humidity is 28%, pressure is 29.99 inHg, and visibility is about 4 miles.
Tonight and tomorrow in Mattawa
Sunrise is at 05:51 AM and sunset is at 08:16 PM. Tomorrow's forecast calls for Smoky haze with a high near 91°F and a low near 63°F. The maximum rain chance is 17%.