Lake Forest Weather Forecast

    • 44
    • 49

    Increasing Clouds

    • 47
    • 74

    Slight Chance Thunderstorms

    • 49
    • 58

    Partly Sunny

    • 59
    • 76

    Rain Showers Likely

    • 46
    • 70

    Chance Rain Showers

    • 45
    • 61

    Partly Sunny

    • 44
    • 57

    Mostly Cloudy

Today 20 Apr Lake

Mostly sunny early in the Morning, then becoming partly cloudy. Highs in the lower 50s Inland, but only in the mid 40s near the lake. Southeast Winds 5 to 10 Mph.

Tonight 20 Apr Lake

Mostly cloudy. Lows in the mid 40s. South Winds 10 to 15 Mph. Gusts up to 25 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Forest Temperature Statistics

April Temperature

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

  • Lowest 7 April, 2026

    28.7 °F

  • Average April

    53.4 °F

  • Highest 12 April, 2026

    81.6 °F

Climate (2021–Present)

Chicago / Wheeling, Pal-Waukee Airport (9.9 miles)

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  • Average Low 2021–2026

    44.1 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    61.6 °F
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