Montesano Weather Forecast

    • 55
    • 81

    Areas Smoke

    • 55
    • 77

    Decreasing Clouds

    • 54
    • 75

    Partly Sunny

    • 53
    • 74

    Partly Sunny

    • 55
    • 75

    Partly Sunny

    • 55
    • 73

    Partly Sunny

    • 54
    • 73

    Partly Sunny

Today 6 Aug Lower Chehalis River Valley

Mostly cloudy in the morning then becoming mostly sunny. Areas of smoke. Highs in the mid 70s to lower 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 6 Aug Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 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 3 August, 2026

    48.9 °F

  • Average August

    63.1 °F

  • Highest 4 August, 2026

    79 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.6 °F
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