Lake Sylvia State Park Weather Forecast

    • 54
    • 69

    Rain Likely

    • 53
    • 70

    Chance Rain

    • 53
    • 71

    Mostly Cloudy

    • 54
    • 73

    Mostly Cloudy

    • 51
    • 76

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

Today 16 Aug Middle Chehalis River Valley

Mostly cloudy with a chance of rain until late Afternoon, then partly sunny with a slight chance of rain late in the afternoon. Highs in the upper 60s to mid 70s. Southwest wind to 10 Mph with Gusts to 20 Mph.

Tonight 16 Aug Middle Chehalis River Valley

Partly cloudy with a slight chance of rain in the Evening, then mostly cloudy after midnight. Mostly cloudy with a slight chance of rain in the morning. Patchy fog in the morning. Lows in the lower to mid 50s. West wind to 10 Mph with Gusts to 20 Mph in the evening becoming light.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Sylvia State Park Temperature Statistics

August Temperature

Hoquiam, Bowerman Airport (15.5 miles)

  • Lowest 8 August, 2025

    49.6 °F

  • Average August

    64 °F

  • Highest 11 August, 2025

    87.7 °F

Climate (2020–Present)

Hoquiam, Bowerman Airport (15.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    58.4 °F
Get WillyWeather+ to remove ads