Montesano Weather Forecast

    • 50
    • 74

    Mostly Sunny

    • 51
    • 75

    Partly Sunny

    • 53
    • 69

    Mostly Cloudy

    • 48
    • 69

    Partly Sunny

    • 49
    • 71

    Mostly Sunny

    • 50
    • 70

    Partly Sunny

Today 3 Oct Lower Chehalis River Valley

Partly sunny in the morning then becoming sunny. Patchy fog in the morning. Highs in the 70s. Light wind.

Tonight 3 Oct Lower Chehalis River Valley

Clear in the evening then becoming partly cloudy. Lows near 50. Light wind.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 October, 2026

    50 °F

  • Average October

    57.7 °F

  • Highest 1 October, 2026

    66.9 °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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