South Fork Tolt Reservoir Weather Forecast

    • 37
    • 48

    Chance Rain

    • 41
    • 56

    Becoming Sunny

    • 42
    • 57

    Rain Likely

    • 44
    • 55

    Rain

    • 37
    • 49

    Rain

    • 34
    • 43

    Rain

    • 32
    • 41

    Rain/Snow

Today 20 Oct Cascades of Snohomish and Northern King Counties

Mostly cloudy. Areas of fog in the morning. Patchy dense fog early in the afternoon. A chance of rain and snow through the day. Snow level near 5000 feet. Afternoon pass Temperatures in the lower 40s. Light wind.

Tonight 20 Oct Cascades of Snohomish and Northern King Counties

Mostly cloudy with a chance of rain and snow in the Evening, then partly cloudy after midnight. Snow level near 6000 feet. Lows in the lower 30s. Light wind.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Fork Tolt Reservoir Temperature Statistics

October Temperature

Renton Municipal Airport (29.2 miles)

  • Lowest 15 October, 2025

    36 °F

  • Average October

    55.1 °F

  • Highest 7 October, 2025

    75.9 °F

Climate (2020–Present)

Renton Municipal Airport (29.2 miles)

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  • Average Low 2020–2025

    47.2 °F

  • Average 2020–2025

    54.5 °F

  • Average High 2020–2025

    62.2 °F
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