Montesano Weather Forecast

    • 54
    • 70

    Mostly Cloudy

    • 48
    • 70

    Partly Sunny

    • 48
    • 73

    Mostly Sunny

    • 51
    • 75

    Partly Sunny

    • 46
    • 65

    Mostly Cloudy

    • 42
    • 62

    Partly Sunny

Today 5 Oct Lower Chehalis River Valley

Mostly cloudy. Areas of fog in the morning. Highs in the mid 60s to lower 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 5 Oct Lower Chehalis River Valley

Mostly cloudy. Patchy fog after midnight. Lows in the lower to mid 50s. West wind to 10 Mph in the evening becoming light.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 October, 2026

    49.6 °F

  • Average October

    59.5 °F

  • Highest 3 October, 2026

    72 °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

    58.6 °F
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