Lake Forest Weather Forecast

    • 57
    • 72

    Slight Chance Rain Showers

    • 56
    • 74

    Mostly Sunny

    • 56
    • 75

    Slight Chance Thunderstorms

    • 58
    • 78

    Rain Showers

    • 57
    • 76

    Chance Rain Showers

    • 57
    • 77

    Partly Sunny

Today 18 Jun Summit

Partly sunny with a 20 percent chance of Showers. Breezy with Highs in the mid 70s. West Winds 15 to 25 Mph with Gusts up to 40 Mph.

Tonight 18 Jun Summit

Mostly clear. A slight chance of Showers in the evening. Lows in the mid 50s. West Winds 10 to 15 Mph with Gusts up to 30 Mph, Diminishing to around 5 Mph after midnight. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

June Temperature

Portage County Airport (11.2 miles)

  • Lowest 1 June, 2026

    45.3 °F

  • Average June

    68.9 °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

    49.9 °F

  • Average High 2021–2026

    59.9 °F
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