Mattawa Weather Forecast

    • 66
    • 95

    Sunny

    • 55
    • 88

    Blowing Dust

    • 55
    • 82

    Sunny

    • 59
    • 86

    Sunny

    • 62
    • 92

    Sunny

    • 64
    • 96

    Sunny

    • 64
    • 95

    Sunny

Today 31 Jul Moses Lake Area

Sunny. Highs in the lower to mid 90s. South wind 5 to 10 Mph.

Tonight 31 Jul Moses Lake Area

Clear. Haze and patchy smoke. Lows in the upper 50s to mid 60s. Light Wind, becoming southwest 5 to 10 Mph overnight.

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Mattawa Temperature Statistics

July Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 1 July, 2026

    44.6 °F

  • Average July

    74.5 °F

  • Highest 22 July, 2026

    101.5 °F

Climate (2021–2026)

Sunnyside Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    38.8 °F

  • Average 2021–2026

    51 °F

  • Average High 2021–2026

    63 °F
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