Mossyrock Weather Forecast

    • 49
    • 67

    Rain

    • 42
    • 56

    Rain Showers

    • 42
    • 61

    Mostly Cloudy

    • 43
    • 61

    Partly Sunny

    • 45
    • 61

    Mostly Cloudy

    • 47
    • 63

    Chance Rain

Today 24 Sep Foothills and Valleys of Thurston and Lewis Counties

Mostly cloudy. A slight chance of rain in the afternoon. Highs in the lower to mid 60s. Light wind.

Tonight 24 Sep Foothills and Valleys of Thurston and Lewis Counties

A chance of rain in the Evening, then rain in the late evening and early morning. Showers likely in the morning. Rainfall Amounts a quarter to a half inch possible. Lows near 50. Light wind becoming southeast to 10 Mph with Gusts to 25 Mph after midnight.

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Mossyrock Temperature Statistics

September Temperature

Chehalis-Centralia Airport (25.5 miles)

  • Lowest 5 September, 2026

    46.4 °F

  • Average September

    59 °F

  • Highest 9 September, 2026

    82.4 °F

Climate (2021–2026)

Chehalis-Centralia Airport (25.5 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    52 °F

  • Average High 2021–2026

    61.3 °F
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