Mattawa Weather Forecast

    • 56
    • 84

    Mostly Sunny

    • 51
    • 75

    Becoming Sunny

    • 54
    • 80

    Mostly Sunny

    • 59
    • 84

    Partly Sunny

    • 57
    • 87

    Partly Sunny

    • 52
    • 77

    Chance Rain Showers

    • 50
    • 74

    Slight Chance Rain Showers

Today 28 Aug Moses Lake Area

Sunny. Highs in the upper 70s to lower 80s. Southwest wind 5 to 10 Mph.

Tonight 28 Aug Moses Lake Area

Mostly clear. Areas of smoke overnight. Lows in the upper 40s to mid 50s. Southwest wind 5 to 10 Mph with Gusts up to 20 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mattawa Temperature Statistics

August Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 2 August, 2026

    44.8 °F

  • Average August

    72.8 °F

  • Highest 6 August, 2026

    97.2 °F

Climate (2021–2026)

Sunnyside Municipal Airport (28.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63.1 °F
Get WillyWeather+ to remove ads