Lake Forest Weather Forecast

    • 33
    • 70

    Rain Showers

    • 22
    • 39

    Mostly Cloudy

    • 35
    • 49

    Mostly Cloudy

    • 44
    • 56

    Chance Rain

    • 32
    • 67

    Chance Rain

    • 24
    • 41

    Partly Sunny

Today 22 Mar Summit

Partly sunny this Morning, then mostly cloudy with Showers likely with a chance of Thunderstorms this afternoon. Warmer with Highs in the lower 70s. Southwest Winds 5 to 10 Mph, becoming northwest 10 to 15 Mph this afternoon. Chance of rain 70 percent.

Tonight 22 Mar Summit

Mostly cloudy. Rain Showers with a slight chance of Thunderstorms in the evening. Much cooler with Lows in the mid 30s. North Winds around 10 Mph with Gusts up to 25 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

March Temperature

Portage County Airport (11.2 miles)

  • Lowest 18 March, 2026

    12.7 °F

  • Average March

    44.6 °F

  • Highest 15 March, 2026

    72.9 °F

Climate (2021–Present)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    49.9 °F

  • Average High 2021–2026

    59.9 °F
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