Montesano Weather Forecast

    • 54
    • 78

    Increasing Clouds

    • 55
    • 66

    Rain

    • 52
    • 60

    Rain Showers

    • 49
    • 62

    Rain Showers

    • 50
    • 65

    Chance Rain

    • 52
    • 69

    Partly Sunny

Today 31 Aug Lower Chehalis River Valley

Partly sunny. Highs in the 70s. Light wind becoming northwest to 10 Mph in the afternoon.

Tonight 31 Aug Lower Chehalis River Valley

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog in the morning. Lows in the lower to mid 50s. Northwest wind to 10 Mph in the evening becoming light.

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  • Temperature Real-Time

Montesano Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 3 August, 2026

    49.6 °F

  • Average August

    62.6 °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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