Montesano Weather Forecast

    • 54
    • 71

    Gradual Clearing

    • 53
    • 73

    Mostly Cloudy

    • 55
    • 74

    Mostly Cloudy

    • 56
    • 73

    Mostly Cloudy

    • 56
    • 69

    Mostly Cloudy

    • 55
    • 71

    Mostly Cloudy

Today 14 Aug Lower Chehalis River Valley

Cloudy in the morning then becoming partly sunny. Highs in the mid 60s to lower 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 14 Aug Lower Chehalis River Valley

Mostly cloudy. Lows in the mid 50s. West wind around 10 Mph in the evening becoming light.

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Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62.7 °F

  • Highest 4 August, 2026

    79.6 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.3 °F

  • Average High 2021–2026

    58.6 °F
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