Mattawa Weather Forecast

    • 62
    • 92

    Mostly Sunny

    • 62
    • 92

    Sunny

    • 65
    • 94

    Mostly Sunny

    • 72
    • 95

    Mostly Cloudy

    • 73
    • 100

    Hot

    • 72
    • 100

    Hot

    • 70
    • 100

    Hot

Today 17 Jul Moses Lake Area

Sunny. Patchy smoke. Highs in the upper 80s to lower 90s. South wind 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 17 Jul Moses Lake Area

Clear. Patchy smoke. Lows in the upper 50s to lower 60s. Southwest wind 5 to 15 Mph. Gusts up to 25 Mph in the evening.

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Mattawa Temperature Statistics

July Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 1 July, 2026

    44.6 °F

  • Average July

    73.6 °F

  • Highest 15 July, 2026

    98.6 °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

    62.9 °F
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