Montesano Weather Forecast

    • 56
    • 74

    Increasing Clouds

    • 56
    • 70

    Mostly Cloudy

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 77

    Mostly Cloudy

    • 56
    • 71

    Chance Rain

    • 56
    • 68

    Chance Rain

Today 17 Aug Lower Chehalis River Valley

Mostly cloudy in the morning then becoming mostly sunny. Patchy fog in the morning. Highs in the 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 17 Aug Lower Chehalis River Valley

Partly cloudy in the evening then becoming cloudy. Patchy fog in the morning. Lows in the upper 50s. West wind around 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 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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