Lake Forest Weather Forecast

    • 59
    • 77

    Rain Showers

    • 42
    • 79

    Rain Showers

    • 34
    • 48

    Mostly Cloudy

    • 30
    • 49

    Chance Rain/Snow

    • 25
    • 41

    Partly Sunny

    • 46
    • 58

    Partly Sunny

Today 3 Apr Summit

Mostly cloudy this Morning, then becoming partly sunny. A chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 3 Apr Summit

A chance of Thunderstorms. A chance of Showers in the Evening, then Showers after midnight. Lows around 60. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southeast after midnight. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

April Temperature

Portage County Airport (11.2 miles)

  • Lowest 1 April, 2026

    37 °F

  • Average April

    42.7 °F

  • Highest 1 April, 2026

    59.2 °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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