South Fork Tolt Reservoir Weather Forecast

    • 50
    • 65

    Chance Rain

    • 50
    • 66

    Mostly Cloudy

    • 49
    • 67

    Mostly Cloudy

    • 49
    • 68

    Partly Sunny

    • 48
    • 68

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

Today 16 Aug Cascades of Snohomish and Northern King Counties

Mostly cloudy. A chance of snow Showers in the morning. A chance of Showers and a slight chance of Thunderstorms through the day. A chance of snow in the afternoon. Snow level near 9000 feet. Afternoon pass Temperatures in the lower 60s. Light wind. Gusts to 20 Mph in the morning.

Tonight 16 Aug Cascades of Snohomish and Northern King Counties

Mostly cloudy. A chance of Showers, snow and a slight chance of Thunderstorms in the Evening, then a slight chance of rain after midnight. Snow level near 8500 feet. Lows in the upper 40s. Light wind.

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  • Temperature Real-Time

South Fork Tolt Reservoir Temperature Statistics

August Temperature

Renton Municipal Airport (29.2 miles)

  • Lowest 8 August, 2025

    52.6 °F

  • Average August

    69.8 °F

  • Highest 12 August, 2025

    92.6 °F

Climate (2020–Present)

Renton Municipal Airport (29.2 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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