Montesano Weather Forecast

    • 51
    • 64

    Increasing Clouds

    • 51
    • 65

    Mostly Cloudy

    • 54
    • 72

    Mostly Cloudy

    • 54
    • 65

    Rain

    • 52
    • 60

    Rain

    • 50
    • 62

    Rain Likely

Today 29 Aug Lower Chehalis River Valley

Partly sunny. A slight chance of Showers late in the morning. Highs in the lower to mid 60s. West wind 10 to 15 Mph.

Tonight 29 Aug Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 40s to mid 50s. West wind around 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

    62.4 °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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