Mattawa Weather Forecast

    • 60
    • 88

    Mostly Sunny

    • 58
    • 90

    Sunny

    • 61
    • 89

    Mostly Sunny

    • 68
    • 94

    Mostly Sunny

    • 62
    • 97

    Hot

    • 57
    • 87

    Mostly Sunny

    • 58
    • 87

    Mostly Sunny

Today 3 Jul Moses Lake Area

Sunny. Highs in the 80s. Southwest wind 5 to 15 Mph with Gusts up to 20 Mph.

Tonight 3 Jul Moses Lake Area

Partly cloudy. Lows in the mid to upper 50s. Southwest wind 5 to 10 Mph with Gusts up to 20 Mph.

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Mattawa Temperature Statistics

July Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 1 July, 2026

    44.6 °F

  • Average July

    64.3 °F

  • Highest 1 July, 2026

    78.8 °F

Climate (2021–2026)

Sunnyside Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63 °F
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