Illinois Beach State Park Weather Forecast

    • 48
    • 61

    Breezy

    • 32
    • 62

    Chance Rain/Snow

    • 31
    • 43

    Slight Chance Snow Showers

    • 40
    • 54

    Mostly Sunny

    • 43
    • 65

    Mostly Cloudy

    • 31
    • 58

    Rain/Snow Likely

Today 14 Mar Lake

Partly cloudy in the Morning, then becoming mostly sunny. Windy. Highs in the mid 70s Inland, but only in the mid 60s near the lake. Unseasonably warm. South Winds 10 to 15 Mph with Gusts up to 30 Mph through mid Morning, increasing to 15 to 25 Mph with Gusts up to 40 Mph in the afternoon.

Tonight 14 Mar Lake

Showers with Thunderstorms likely. Windy with Lows in the lower 50s. Unseasonably warm. Southeast Winds 15 to 25 Mph early in the Evening, increasing to south 20 to 30 Mph in the late evening and early Morning, then Diminishing to 10 to 20 Mph late. Gusts up to 45 Mph. Chance of precipitation near 100 percent.

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Illinois Beach State Park Temperature Statistics

March Temperature

Chicago/Waukegan Regional Airport (2.5 miles)

  • Lowest 2 March, 2025

    13.7 °F

  • Average March

    39 °F

  • Highest 10 March, 2025

    69.1 °F

Climate (2020–Present)

Chicago/Waukegan Regional Airport (2.5 miles)

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  • Average Low 2020–2025

    42.2 °F

  • Average 2020–2025

    50.8 °F

  • Average High 2020–2025

    59.2 °F
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