Montesano Weather Forecast

    • 40
    • 61

    Increasing Clouds

    • 38
    • 60

    Decreasing Clouds

    • 37
    • 63

    Mostly Sunny

    • 41
    • 66

    Partly Sunny

    • 40
    • 59

    Partly Sunny

    • 37
    • 59

    Mostly Cloudy

    • 39
    • 57

    Chance Rain Showers

Today 18 Oct Lower Chehalis River Valley

Mostly cloudy with a chance of rain. Highs in the mid to upper 50s.

Tonight 18 Oct Lower Chehalis River Valley

Mostly cloudy. Lows in the upper 30s to mid 40s. Light wind.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 12 October, 2026

    37.7 °F

  • Average October

    56.4 °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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