Lake Forest Weather Forecast

    • 35
    • 62

    Patchy Fog

    • 51
    • 59

    Decreasing Clouds

    • 34
    • 74

    Rain Showers Likely

    • 27
    • 42

    Mostly Cloudy

    • 34
    • 51

    Mostly Cloudy

    • 34
    • 47

    Mostly Cloudy

    • 32
    • 67

    Rain Likely

Today 20 Mar Summit

Showers likely with a slight chance of Thunderstorms. Not as cool with Highs in the lower 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 20 Mar Summit

Mostly cloudy. A slight chance of rain Showers and Thunderstorms this evening. Patchy fog. Lows in the mid 30s. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming north after midnight. Chance of rain 20 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

    44.5 °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

    49.9 °F

  • Average High 2021–2026

    59.9 °F
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