Lake Forest Weather Forecast

    • 63
    • 81

    Rain Showers

    • 56
    • 78

    Mostly Sunny

    • 64
    • 83

    Mostly Sunny

    • 65
    • 84

    Chance Thunderstorms

    • 66
    • 84

    Chance Thunderstorms

    • 66
    • 84

    Chance Thunderstorms

Today 2 Aug Summit

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms this Morning, then Showers with Thunderstorms likely this afternoon. Some Thunderstorms may produce heavy rainfall. Highs in the lower 80s. Southeast Winds 5 to 10 Mph, becoming southwest this afternoon. Chance of rain 90 percent.

Tonight 2 Aug Summit

Mostly cloudy. Showers with Thunderstorms likely this Evening, then a chance of Showers after midnight. Some Thunderstorms may produce heavy rainfall this evening. Lows in the lower 60s. North Winds 5 to 10 Mph. Chance of rain 90 percent.

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Lake Forest Temperature Statistics

August Temperature

Portage County Airport (11.2 miles)

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  • Average August

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Climate (2021–2026)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    60.1 °F
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