Montesano Weather Forecast

    • 42
    • 63

    Increasing Clouds

    • 49
    • 60

    Mostly Cloudy

    • 50
    • 64

    Slight Chance Rain

    • 48
    • 73

    Mostly Sunny

    • 53
    • 71

    Chance Rain

    • 43
    • 62

    Slight Chance Rain

    • 46
    • 60

    Rain Likely

Today 12 Oct Lower Chehalis River Valley

Rain likely. Highs in the mid to upper 50s.

Tonight 12 Oct Lower Chehalis River Valley

Clear then becoming partly cloudy in the late evening and early morning then becoming mostly cloudy. Lows in the 40s. Light wind.

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  • Temperature Real-Time

Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 10 October, 2026

    45 °F

  • Average October

    57.9 °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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