Rock Island Weather Forecast

    • 50
    • 53

    Rain Showers Likely

    • 43
    • 60

    Rain Showers Likely

    • 42
    • 46

    Rain Likely

    • 43
    • 55

    Rain Showers Likely

    • 39
    • 46

    Slight Chance Rain Showers

    • 32
    • 45

    Breezy

    • 35
    • 44

    Mostly Sunny

Today 3 Apr Southern New London

Mostly cloudy with a 40 percent chance of Showers. Areas of fog. Highs in the upper 50s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 3 Apr Southern New London

Cloudy. A slight chance of Showers this Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Areas of fog. Lows in the lower 50s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph, becoming west after midnight. Chance of rain 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Island Temperature Statistics

April Temperature

Groton / New London, Groton / New London Airport (5.6 miles)

  • Lowest 1 April, 2025

    41 °F

  • Average April

    48.4 °F

  • Highest 1 April, 2025

    55 °F

Climate (2020–Present)

Groton / New London, Groton / New London Airport (5.6 miles)

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  • Average Low 2020–2025

    45.5 °F

  • Average 2020–2025

    53.4 °F

  • Average High 2020–2025

    61 °F
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