Mattawa Weather Forecast

    • 30
    • 46

    Decreasing Clouds

    • 33
    • 46

    Partly Sunny

    • 31
    • 48

    Mostly Cloudy

    • 30
    • 42

    Mostly Cloudy

    • 32
    • 44

    Mostly Cloudy

    • 36
    • 47

    Mostly Cloudy

    • 34
    • 48

    Mostly Cloudy

Today 7 Jan Moses Lake Area

Partly sunny. A chance of rain or snow in the afternoon. Highs in the upper 30s to lower 40s. Breezy. Southwest wind 10 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 20 percent.

Tonight 7 Jan Moses Lake Area

Mostly cloudy. A chance of rain or snow in the evening. Lows in the mid 20s to lower 30s. Southwest wind 5 to 15 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent.

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Mattawa Temperature Statistics

January Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 1 January, 2026

    23.7 °F

  • Average January

    35.2 °F

  • Highest 4 January, 2026

    50.5 °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

    63.6 °F
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