Mattawa Weather Forecast

    • 61
    • 88

    Increasing Clouds

    • 61
    • 90

    Slight Chance Rain Showers

    • 63
    • 91

    Partly Sunny

    • 61
    • 92

    Partly Sunny

    • 59
    • 90

    Mostly Sunny

    • 60
    • 89

    Partly Sunny

    • 61
    • 90

    Mostly Sunny

Today 14 Aug Moses Lake Area

Sunny. Patchy smoke. Highs in the 80s. North wind 5 to 10 Mph.

Tonight 14 Aug Moses Lake Area

Partly cloudy. Patchy smoke. Lows in the mid 50s to lower 60s. North wind 5 to 10 Mph.

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Mattawa Temperature Statistics

August Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 2 August, 2026

    44.8 °F

  • Average August

    72.7 °F

  • Highest 6 August, 2026

    97.2 °F

Climate (2021–2026)

Sunnyside Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    38.7 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63 °F
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