Montesano Weather Forecast

    • 41
    • 56

    Rain

    • 38
    • 54

    Rain

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    Rain

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    • 53

    Chance Rain

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    • 55

    Chance Rain

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    • 56

    Mostly Cloudy

Today 27 Oct Lower Chehalis River Valley

Partly sunny. A slight chance of Showers late in the afternoon. Highs in the lower to mid 50s. Light wind becoming west 10 to 15 Mph in the afternoon.

Tonight 27 Oct Lower Chehalis River Valley

A chance of Showers in the Evening, then a slight chance of Thunderstorms in the late evening and early morning. Showers after midnight. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Lows in the upper 30s to mid 40s. Southwest wind to 10 Mph with Gusts to 20 Mph.

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Montesano Temperature Statistics

October Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 23 October, 2026

    36 °F

  • Average October

    54.9 °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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