Montesano Weather Forecast

    • 55
    • 69

    Rain Likely

    • 53
    • 70

    Chance Rain

    • 53
    • 71

    Areas Fog

    • 54
    • 72

    Mostly Cloudy

    • 51
    • 75

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

Today 16 Aug Lower Chehalis River Valley

Mostly cloudy with a chance of rain. Highs in the mid 60s to lower 70s. Southwest wind around 10 Mph.

Tonight 16 Aug Lower Chehalis River Valley

Mostly cloudy with a slight chance of rain until early Morning, then mostly cloudy with a chance of rain in the morning. Patchy fog after midnight. Lows in the 50s. West wind to 10 Mph in the evening becoming light.

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Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 8 August, 2025

    49.6 °F

  • Average August

    64 °F

  • Highest 11 August, 2025

    87.7 °F

Climate (2020–Present)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    58.4 °F
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