Montesano Weather Forecast

    • 57
    • 68

    Chance Rain

    • 54
    • 70

    Mostly Cloudy

    • 55
    • 80

    Partly Sunny

    • 56
    • 75

    Mostly Cloudy

    • 53
    • 67

    Mostly Cloudy

    • 51
    • 68

    Mostly Cloudy

Today 22 Aug Lower Chehalis River Valley

Mostly cloudy. Highs in the 60s to lower 70s. South wind around 10 Mph becoming southwest in the afternoon.

Tonight 22 Aug Lower Chehalis River Valley

Mostly cloudy. A slight chance of Showers late in the evening. A chance of Showers after midnight. Lows in the upper 50s. Southwest wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62 °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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