Flat Lake Weather Forecast

    • 40
    • 75

    Chance Rain Showers

    • 29
    • 50

    Breezy

    • 28
    • 46

    Mostly Cloudy

    • 27
    • 52

    Partly Sunny

    • 37
    • 59

    Mostly Cloudy

    • 38
    • 64

    Partly Sunny

Today 3 May McHenry

Mostly sunny. Windy. Highs in the mid 70s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph, increasing to west 25 to 30 Mph with Gusts up to 45 Mph in the afternoon.

Tonight 3 May McHenry

Mostly cloudy. A chance of Showers in the Evening, then a slight chance of Showers after midnight. Lows around 40. Northwest Winds around 20 Mph. Gusts up to 40 Mph in the evening. Chance of rain 40 percent.

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Flat Lake Temperature Statistics

May Temperature

Harvey Municipal Airport (22.4 miles)

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  • Average May

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Climate (2021–Present)

Harvey Municipal Airport (22.4 miles)

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  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.2 °F

  • Average High 2021–2026

    51.9 °F
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