Lake Forest Weather Forecast

    • 64
    • 82

    Mostly Cloudy

    • 69
    • 86

    Slight Chance Rain Showers

    • 73
    • 89

    Mostly Cloudy

    • 74
    • 93

    Partly Sunny

    • 73
    • 94

    Chance Rain Showers

    • 67
    • 88

    Chance Rain Showers

    • 64
    • 83

    Slight Chance Rain Showers

Today 29 Aug Summit

Mostly sunny. Highs in the lower 80s. South Winds around 5 Mph.

Tonight 29 Aug Summit

Mostly cloudy. Not as cool with Lows in the mid 60s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

August Temperature

Portage County Airport (11.2 miles)

  • Lowest 4 August, 2026

    50.4 °F

  • Average August

    69.4 °F

  • Highest 5 August, 2026

    87.6 °F

Climate (2021–2026)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    60 °F
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