Montesano Weather Forecast

    • 57
    • 71

    Mostly Cloudy

    • 56
    • 67

    Chance Rain

    • 53
    • 67

    Mostly Cloudy

    • 50
    • 66

    Mostly Cloudy

    • 51
    • 68

    Mostly Cloudy

    • 53
    • 67

    Chance Rain

Today 26 Aug Lower Chehalis River Valley

Cloudy until late afternoon then becoming partly sunny. Highs in the upper 60s to mid 70s. Light wind becoming southwest to 10 Mph in the afternoon.

Tonight 26 Aug Lower Chehalis River Valley

Mostly cloudy. A slight chance of Showers in the morning. Lows in the mid to 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

    62.4 °F

  • Highest 24 August, 2026

    80.1 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.6 °F
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