Round Lake Weather Forecast

    • 36
    • 68

    Mostly Sunny

    • 40
    • 61

    Mostly Sunny

    • 53
    • 71

    Partly Sunny

    • 48
    • 70

    Chance Rain Showers

    • 34
    • 55

    Breezy

    • 31
    • 48

    Mostly Cloudy

Today 20 Oct McHenry

Sunny. Highs in the mid 60s. South Winds 5 to 10 Mph, becoming southwest in the afternoon.

Tonight 20 Oct McHenry

Partly cloudy in the evening then clearing. Lows in the mid 30s. North Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Round Lake Temperature Statistics

October Temperature

Harvey Municipal Airport (23 miles)

  • Lowest 16 October, 2026

    28.4 °F

  • Average October

    49.6 °F

  • Highest 9 October, 2026

    75.2 °F

Climate (2021–2026)

Harvey Municipal Airport (23 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    30.3 °F

  • Average 2021–2026

    41.1 °F

  • Average High 2021–2026

    51.7 °F
Get WillyWeather+ to remove ads