Montesano Weather Forecast

    • 47
    • 56

    Rain

    • 49
    • 54

    Rain

    • 46
    • 57

    Rain

    • 39
    • 53

    Rain

    • 40
    • 47

    Rain

    • 40
    • 48

    Rain

Today 13 Dec Lower Chehalis River Valley

Mostly cloudy. Patchy dense fog in the morning. Highs in the mid to upper 50s. Light wind.

Tonight 13 Dec Lower Chehalis River Valley

Mostly cloudy with a slight chance of rain in the Evening, then cloudy with rain at Times after midnight. Rainfall Amounts a tenth to a quarter of an inch possible. Lows in the mid 40s to lower 50s. South wind to 10 Mph. Gusts to 25 Mph after midnight.

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Montesano Temperature Statistics

December Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 December, 2025

    35.1 °F

  • Average December

    48.9 °F

  • Highest 7 December, 2025

    55 °F

Climate (2020–Present)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2020–2025

    46.3 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    58.4 °F
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