Mattawa Weather Forecast

    • 35
    • 43

    Rain/Freezing Rain Likely

    • 35
    • 42

    Rain Likely

    • 35
    • 45

    Slight Chance Rain

    • 35
    • 45

    Mostly Cloudy

    • 36
    • 47

    Mostly Cloudy

    • 35
    • 52

    Mostly Cloudy

    • 35
    • 50

    Mostly Cloudy

Today 28 Jan Moses Lake Area

Mostly cloudy. A chance of snow and freezing rain in the morning. Highs in the mid 30s to lower 40s. South wind 5 to 10 Mph. Chance of precipitation 50 percent.

Tonight 28 Jan Moses Lake Area

Cloudy. A chance of rain. Lows in the lower to mid 30s. Southeast wind 5 to 10 Mph. Chance of precipitation 40 percent. Rainfall Amounts less than a tenth of an inch.

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Mattawa Temperature Statistics

January Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 25 January, 2026

    16.7 °F

  • Average January

    33.7 °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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