Montesano Weather Forecast

    • 55
    • 65

    Rain Likely

    • 52
    • 67

    Mostly Cloudy

    • 51
    • 65

    Mostly Cloudy

    • 50
    • 66

    Mostly Cloudy

    • 53
    • 67

    Chance Rain

    • 53
    • 64

    Rain Likely

Today 27 Aug Lower Chehalis River Valley

Mostly cloudy with a chance of Showers. Highs in the 60s. South wind to 10 Mph becoming southwest in the afternoon.

Tonight 27 Aug Lower Chehalis River Valley

Mostly cloudy. Patchy fog in the morning. Lows in the mid to upper 50s. West 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

    62.5 °F

  • Highest 24 August, 2026

    82.7 °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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