South Montesano Weather Forecast

    • 41
    • 54

    Rain Showers Likely

    • 44
    • 63

    Mostly Cloudy

    • 46
    • 64

    Partly Sunny

    • 45
    • 65

    Mostly Cloudy

    • 47
    • 69

    Partly Sunny

    • 47
    • 69

    Partly Sunny

Today 16 May Lower Chehalis River Valley

Mostly cloudy with a chance of Showers in the Morning, then partly sunny with a chance of Showers and a slight chance of Thunderstorms in the afternoon. Highs in the 50s. West wind 10 to 20 Mph. Gusts to 30 Mph in the afternoon.

Tonight 16 May Lower Chehalis River Valley

Partly cloudy. A slight chance of Showers in the evening. Lows in the upper 30s to mid 40s. West wind 15 to 20 Mph with Gusts to 30 Mph becoming northwest to 10 Mph with Gusts to 20 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Montesano Temperature Statistics

May Temperature

Hoquiam, Bowerman Airport (14.3 miles)

  • Lowest 7 May, 2026

    48.7 °F

  • Average May

    57.5 °F

  • Highest 3 May, 2026

    82.7 °F

Climate (2021–Present)

Hoquiam, Bowerman Airport (14.3 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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