Montesano Weather Forecast

    • 54
    • 81

    Patchy Smoke

    • 57
    • 90

    Smoke

    • 56
    • 92

    Mostly Sunny

    • 55
    • 84

    Partly Sunny

    • 54
    • 80

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 54
    • 72

    Mostly Cloudy

Today 3 Aug Lower Chehalis River Valley

Sunny. Highs in the mid 70s to lower 80s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 3 Aug Lower Chehalis River Valley

Clear. Patchy smoke in the evening. Lows in the lower to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 August, 2026

    57.9 °F

  • Average August

    62.5 °F

  • Highest 1 August, 2026

    66 °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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