Mattawa Weather Forecast

    • 37
    • 70

    Decreasing Clouds

    • 42
    • 62

    Mostly Cloudy

    • 39
    • 61

    Mostly Cloudy

    • 38
    • 65

    Mostly Sunny

    • 38
    • 63

    Mostly Sunny

    • 39
    • 64

    Partly Sunny

Today 17 Oct Moses Lake Area

Mostly sunny. Patchy blowing dust in the afternoon. Highs in the mid to upper 60s. Breezy. Southwest wind 10 to 20 Mph. Gusts up to 25 Mph increasing to 40 Mph in the afternoon.

Tonight 17 Oct Moses Lake Area

Partly cloudy. Areas of frost overnight. Lows in the lower to mid 30s. Northwest wind 5 to 15 Mph. Gusts up to 25 Mph in the evening.

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Mattawa Temperature Statistics

October Temperature

Sunnyside Municipal Airport (28.6 miles)

  • Lowest 13 October, 2026

    30.6 °F

  • Average October

    55.4 °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

    51.1 °F

  • Average High 2021–2026

    63.1 °F
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