Montesano Weather Forecast

    • 57
    • 73

    Increasing Clouds

    • 56
    • 70

    Mostly Cloudy

    • 55
    • 67

    Chance Rain Showers

    • 53
    • 67

    Mostly Cloudy

    • 51
    • 66

    Mostly Cloudy

    • 52
    • 69

    Chance Rain

Today 25 Aug Lower Chehalis River Valley

Mostly sunny. Highs in the upper 60s to mid 70s. South wind to 10 Mph becoming southwest in the afternoon.

Tonight 25 Aug Lower Chehalis River Valley

Cloudy. A slight chance of Showers late in the evening. Lows in the mid to upper 50s. Southwest wind to 10 Mph with Gusts to 20 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

    62.1 °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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