Lake Forest Weather Forecast

    • 38
    • 66

    Mostly Sunny

    • 39
    • 66

    Mostly Sunny

    • 42
    • 69

    Mostly Sunny

    • 44
    • 70

    Partly Sunny

    • 43
    • 65

    Mostly Cloudy

    • 48
    • 68

    Partly Sunny

    • 46
    • 71

    Partly Sunny

Today 23 Oct Summit

Mostly sunny. Near steady temperature in the mid 60s. Northeast Winds around 5 Mph.

Tonight 23 Oct Summit

Mostly clear. Patchy fog after midnight. Lows in the upper 30s. East Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

October Temperature

Portage County Airport (11.2 miles)

  • Lowest 18 October, 2026

    29.8 °F

  • Average October

    55.6 °F

  • Highest 13 October, 2026

    83.3 °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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