Mattawa Weather Forecast

    • 33
    • 43

    Chance Rain

    • 30
    • 44

    Chance Rain/Snow

    • 24
    • 41

    Partly Sunny

    • 25
    • 36

    Mostly Cloudy

    • 26
    • 36

    Mostly Cloudy

    • 26
    • 38

    Mostly Cloudy

Today 25 Dec Moses Lake Area

A chance of freezing rain in the morning. Patchy dense fog in the morning. Mostly cloudy with a chance of rain. Highs in the lower 40s to lower 50s. Northeast wind 5 to 15 Mph with Gusts up to 20 Mph. Chance of precipitation 50 percent.

Tonight 25 Dec Moses Lake Area

Mostly cloudy. A chance of rain. Lows in the lower to mid 30s. South wind 5 to 10 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an inch.

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Mattawa Temperature Statistics

December Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 22 December, 2025

    28 °F

  • Average December

    46.7 °F

  • Highest 15 December, 2025

    69.1 °F

Climate (2020–Present)

Sunnyside Municipal Airport (28.6 miles)

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  • Average Low 2020–2025

    38.9 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    63.6 °F
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