Montesano Weather Forecast

    • 51
    • 60

    Rain Showers

    • 48
    • 61

    Rain Showers

    • 50
    • 67

    Chance Rain

    • 53
    • 72

    Slight Chance Rain

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 68

    Slight Chance Rain

Today 2 Sep Lower Chehalis River Valley

Breezy. Showers and a slight chance of Thunderstorms. Rainfall Amounts a half inch to one inch Possible, except higher Amounts possible in Thunderstorms. Highs in the lower to mid 60s. Southeast wind 15 to 25 Mph.

Tonight 2 Sep Lower Chehalis River Valley

Showers and a slight chance of Thunderstorms. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Lows in the upper 40s to mid 50s. South wind 10 to 20 Mph becoming southeast 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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