Lake Forest Weather Forecast

    • 74
    • 95

    Partly Sunny

    • 74
    • 97

    Hot

    • 74
    • 97

    Slight Chance Thunderstorms

    • 71
    • 96

    Chance Thunderstorms

    • 68
    • 91

    Chance Thunderstorms

    • 67
    • 89

    Chance Thunderstorms

Today 30 Jun Summit

Partly cloudy. Hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Heat index Values up to 104.

Tonight 30 Jun Summit

Mostly clear. Humid with Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Heat index Values up to 103 early in the evening.

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Lake Forest Temperature Statistics

June Temperature

Portage County Airport (11.2 miles)

  • Lowest 1 June, 2026

    45.3 °F

  • Average June

    66.8 °F

  • Highest 10 June, 2026

    87.6 °F

Climate (2021–2026)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    60 °F
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