Montesano Weather Forecast

    • 55
    • 73

    Decreasing Clouds

    • 55
    • 78

    Mostly Cloudy

    • 57
    • 76

    Mostly Cloudy

    • 56
    • 66

    Chance Rain

    • 54
    • 71

    Partly Sunny

    • 54
    • 75

    Mostly Cloudy

Today 19 Aug Lower Chehalis River Valley

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

Tonight 19 Aug Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 50s. Light wind.

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  • Temperature Real-Time

Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62.3 °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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