Montesano Weather Forecast

    • 55
    • 66

    Rain Likely

    • 51
    • 59

    Rain Showers

    • 49
    • 60

    Rain Showers

    • 50
    • 66

    Chance Rain

    • 51
    • 70

    Chance Rain

    • 53
    • 70

    Slight Chance Rain

Today 1 Sep Lower Chehalis River Valley

Mostly cloudy. Patchy fog in the morning. A slight chance of rain in the afternoon. Highs in the 60s. Light wind becoming southwest around 10 Mph in the afternoon.

Tonight 1 Sep Lower Chehalis River Valley

Mostly cloudy. A chance of rain. Lows in the mid to upper 50s. South wind to 10 Mph increasing to 10 to 15 Mph after midnight.

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Montesano Temperature Statistics

September Temperature

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average September

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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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