Mattawa Weather Forecast

    • 30
    • 33

    Cloudy

    • 25
    • 33

    Mostly Cloudy

    • 22
    • 37

    Mostly Sunny

    • 23
    • 34

    Mostly Sunny

    • 24
    • 35

    Partly Sunny

    • 26
    • 36

    Mostly Cloudy

    • 28
    • 40

    Mostly Cloudy

Today 21 Jan Moses Lake Area

Cloudy. Highs in the lower to mid 30s. Northeast wind 5 to 10 Mph.

Tonight 21 Jan Moses Lake Area

Mostly cloudy. Lows in the lower to mid 20s. Light wind.

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Mattawa Temperature Statistics

January Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 1 January, 2026

    23.7 °F

  • Average January

    35.3 °F

  • Highest 12 January, 2026

    59.9 °F

Climate (2021–Present)

Sunnyside Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    38.9 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    63.5 °F
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