Lake Forest Weather Forecast

    • 33
    • 61

    Mostly Cloudy

    • 25
    • 46

    Rain

    • 24
    • 30

    Snow

    • 28
    • 36

    Partly Sunny

    • 33
    • 42

    Rain/Snow Likely

    • 18
    • 39

    Rain/Snow Likely

    • 16
    • 24

    Chance Snow

Today 9 Jan Summit

Mostly cloudy with a 50 percent chance of rain. Warmer with Highs in the lower 60s. Temperature falling into the upper 40s. Southwest Winds 15 to 20 Mph with Gusts up to 45 Mph.

Tonight 9 Jan Summit

Mostly cloudy. Cooler with Lows in the mid 30s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming northeast around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

January Temperature

Portage County Airport (11.2 miles)

  • Lowest 1 January, 2026

    12.6 °F

  • Average January

    27 °F

  • Highest 6 January, 2026

    45.7 °F

Climate (2021–Present)

Portage County Airport (11.2 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    49.8 °F

  • Average High 2021–2026

    59.8 °F
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