Lake Forest Weather Forecast

    • 32
    • 74

    Rain Showers

    • 24
    • 41

    Partly Sunny

    • 30
    • 42

    Partly Sunny

    • 45
    • 58

    Mostly Cloudy

    • 53
    • 64

    Rain Likely

    • 53
    • 71

    Rain Likely

    • 50
    • 70

    Chance Thunderstorms

Today 26 Mar Summit

Partly sunny with a chance of Showers this Morning, then mostly cloudy with a chance of Thunderstorms with a slight chance of Showers this afternoon. Warmer with Highs in the lower 70s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 26 Mar Summit

A chance of Thunderstorms this evening. Rain Showers. Some Thunderstorms may be severe with damaging Winds. Much cooler with Lows in the lower 30s. North Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 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

    43.9 °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

    40.3 °F

  • Average 2021–2026

    49.8 °F

  • Average High 2021–2026

    59.8 °F
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