Montesano Weather Forecast

    • 50
    • 76

    Increasing Clouds

    • 55
    • 88

    Mostly Sunny

    • 55
    • 89

    Partly Sunny

    • 52
    • 77

    Partly Sunny

    • 52
    • 67

    Rain

    • 51
    • 62

    Rain Likely

Today 21 Jun Lower Chehalis River Valley

Cloudy then becoming partly sunny late in the morning then becoming sunny. Highs in the 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 21 Jun Lower Chehalis River Valley

Clear in the evening then becoming partly cloudy. Patchy fog in the morning. Lows near 50. West wind to 10 Mph in the evening becoming light.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Montesano Temperature Statistics

June Temperature

Hoquiam, Bowerman Airport (14.9 miles)

  • Lowest 1 June, 2026

    42.7 °F

  • Average June

    59.4 °F

  • Highest 14 June, 2026

    86 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (14.9 miles)

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  • Average Low 2021–2026

    46.4 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.7 °F
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