Montesano Weather Forecast

    • 55
    • 88

    Patchy Smoke

    • 55
    • 82

    Increasing Clouds

    • 55
    • 78

    Partly Sunny

    • 54
    • 76

    Partly Sunny

    • 53
    • 73

    Partly Sunny

    • 55
    • 75

    Partly Sunny

    • 55
    • 74

    Partly Sunny

Today 5 Aug Lower Chehalis River Valley

Sunny. Patchy smoke through the day. Highs in the upper 70s to mid 80s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 5 Aug Lower Chehalis River Valley

Clear then becoming partly cloudy after midnight then becoming mostly cloudy. Patchy smoke in the evening. Lows in the mid to upper 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

    62.1 °F

  • Highest 3 August, 2026

    73 °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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