Old Lyme Weather Forecast

    • 61
    • 73

    Rain Showers Likely

    • 59
    • 78

    Partly Sunny

    • 51
    • 81

    Mostly Sunny

    • 50
    • 71

    Mostly Sunny

    • 53
    • 70

    Partly Sunny

    • 58
    • 74

    Partly Sunny

    • 60
    • 78

    Partly Sunny

Today 17 Sep Southern New London

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs in the lower 70s. East Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 17 Sep Southern New London

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Patchy fog. Lows in the lower 60s. Northeast Winds 5 to 10 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Old Lyme Temperature Statistics

September Temperature

Chester, Chester Airport (11.2 miles)

  • Lowest 8 September, 2025

    50 °F

  • Average September

    65.1 °F

  • Highest 5 September, 2025

    82.4 °F

Climate (2020–Present)

Chester, Chester Airport (11.2 miles)

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

  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    62.6 °F
Get WillyWeather+ to remove ads