Round Lake Weather Forecast

    • 69
    • 82

    Mostly Cloudy

    • 62
    • 79

    Rain Showers

    • 51
    • 77

    Partly Sunny

    • 58
    • 78

    Mostly Sunny

    • 60
    • 81

    Partly Sunny

    • 59
    • 78

    Chance Rain Showers

Today 8 Sep Clinton

Partly sunny. Highs in the lower 80s. Light Winds becoming south 5 to 10 Mph with Gusts to around 20 Mph in the afternoon.

Tonight 8 Sep Clinton

Partly cloudy. Lows in the upper 60s. South Winds 5 to 10 Mph with Gusts to around 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Round Lake Temperature Statistics

September Temperature

Capital Region International Airport (10.6 miles)

  • Lowest 6 September, 2026

    55 °F

  • Average September

    74.7 °F

  • Highest 2 September, 2026

    91.7 °F

Climate (2021–2026)

Capital Region International Airport (10.6 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    60.2 °F
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