Lake Forest Weather Forecast

    • 53
    • 73

    Slight Chance Thunderstorms

    • 38
    • 69

    Rain Showers

    • 41
    • 58

    Partly Sunny

    • 62
    • 76

    Mostly Cloudy

    • 62
    • 76

    Chance Thunderstorms

    • 60
    • 80

    Rain Showers Likely

Today 9 Apr Summit

Partly sunny with a slight chance of Showers and Thunderstorms. Not as cool with Highs in the lower 70s. Southwest Winds around 15 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 9 Apr Summit

Mostly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then partly cloudy after midnight. Lows in the lower 50s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

April Temperature

Portage County Airport (11.2 miles)

  • Lowest 7 April, 2026

    23.9 °F

  • Average April

    48.9 °F

  • Highest 4 April, 2026

    79.9 °F

Climate (2021–Present)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    49.8 °F

  • Average High 2021–2026

    59.8 °F
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