Mattawa Weather Forecast

    • 36
    • 57

    Mostly Cloudy

    • 32
    • 55

    Mostly Sunny

    • 39
    • 55

    Mostly Cloudy

    • 35
    • 57

    Mostly Cloudy

    • 36
    • 57

    Mostly Cloudy

    • 36
    • 57

    Mostly Cloudy

Today 31 Oct Moses Lake Area

Patchy fog in the morning. Partly sunny. Highs in the lower to mid 50s. Northeast wind 5 to 10 Mph.

Tonight 31 Oct Moses Lake Area

Mostly cloudy with a 20 percent chance of rain Showers. Lows in the 30s. North wind 5 to 10 Mph.

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Mattawa Temperature Statistics

October Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 24 October, 2026

    28.8 °F

  • Average October

    51.4 °F

  • Highest 5 October, 2026

    81.7 °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

    63.1 °F
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