Round Lake Weather Forecast

    • -20
    • -6

    Blustery

    • -24
    • -9

    Cold

    • -24
    • -14

    Cold

    • 6
    • 17

    Chance Snow

    • 3
    • 21

    Slight Chance Snow

    • 3
    • 15

    Mostly Cloudy

Today 18 Jan McHenry

Mostly sunny. Brisk. Much Colder. Highs around 5 below. Northwest Winds 15 to 25 Mph with Gusts up to 35 Mph. Wind Chills around 40 below.

Tonight 18 Jan McHenry

Partly cloudy. Lows around 20 below. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Wind Chills around 40 below.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Round Lake Temperature Statistics

January Temperature

Harvey Municipal Airport (23 miles)

  • Lowest 14 January, 2025

    -27.4 °F

  • Average January

    2.9 °F

  • Highest 15 January, 2025

    35.6 °F

Climate (2020–Present)

Harvey Municipal Airport (23 miles)

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  • Average Low 2020–2025

    30.2 °F

  • Average 2020–2025

    41.2 °F

  • Average High 2020–2025

    51.9 °F
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