Montesano Weather Forecast

    • 43
    • 60

    Partly Sunny

    • 38
    • 60

    Mostly Sunny

    • 38
    • 63

    Sunny

    • 41
    • 64

    Partly Sunny

    • 48
    • 61

    Chance Rain

    • 47
    • 63

    Partly Sunny

    • 48
    • 66

    Partly Sunny

Today 9 Oct Lower Chehalis River Valley

Cloudy with a chance of rain in the Morning, then mostly sunny in the afternoon. Highs near 60. West wind 10 to 15 Mph becoming northwest 10 to 20 Mph in the afternoon.

Tonight 9 Oct Lower Chehalis River Valley

Partly cloudy. A slight chance of rain after midnight. Lows in the 40s. Northwest wind 10 to 20 Mph.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 7 October, 2026

    48 °F

  • Average October

    58.8 °F

  • Highest 3 October, 2026

    73.7 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.7 °F
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