Round Lake Weather Forecast

    • 40
    • 59

    Chance Rain Showers

    • 42
    • 71

    Partly Sunny

    • 28
    • 63

    Rain/Snow Likely

    • 20
    • 36

    Slight Chance Snow

    • 21
    • 43

    Breezy

    • 33
    • 51

    Partly Sunny

Today 14 Apr McHenry

Mostly cloudy with a chance of Showers in the Morning, then partly sunny in the afternoon. Highs around 60. Southeast Winds around 5 Mph, becoming southwest in the afternoon. Chance of rain 30 percent.

Tonight 14 Apr McHenry

Mostly clear. Lows around 40. South Winds around 10 Mph.

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Round Lake Temperature Statistics

April Temperature

Harvey Municipal Airport (23 miles)

  • Lowest 6 April, 2026

    15.8 °F

  • Average April

    32.8 °F

  • Highest 10 April, 2026

    55.4 °F

Climate (2021–Present)

Harvey Municipal Airport (23 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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