Montesano Weather Forecast

    • 55
    • 90

    Patchy Smoke

    • 55
    • 88

    Patchy Smoke

    • 55
    • 84

    Partly Sunny

    • 54
    • 79

    Partly Sunny

    • 54
    • 77

    Partly Sunny

    • 53
    • 73

    Partly Sunny

    • 55
    • 74

    Partly Sunny

Today 4 Aug Lower Chehalis River Valley

Sunny. Patchy smoke late in the afternoon. Highs in the 80s to lower 90s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 4 Aug Lower Chehalis River Valley

Partly cloudy. Patchy smoke in the evening. Patchy smoke after midnight. Lows in the mid to upper 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 2 August, 2026

    55 °F

  • Average August

    61.6 °F

  • Highest 1 August, 2026

    67.6 °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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