Montesano Weather Forecast

    • 53
    • 71

    Decreasing Clouds

    • 56
    • 83

    Mostly Sunny

    • 57
    • 78

    Mostly Cloudy

    • 54
    • 69

    Slight Chance Rain

    • 52
    • 68

    Mostly Cloudy

    • 51
    • 69

    Mostly Cloudy

Today 23 Aug Lower Chehalis River Valley

Partly sunny. Highs in the mid 60s to lower 70s. Southwest wind around 10 Mph becoming west in the afternoon.

Tonight 23 Aug Lower Chehalis River Valley

Partly cloudy. Lows in the lower to mid 50s. Northwest wind 10 to 15 Mph becoming north after midnight.

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Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62.1 °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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