10-Day Weather Forecast - Old Lyme, CT

Patchy fog in the morning. Mostly cloudy with a chance of showers and thunderstorms likely in the morning then partly sunny with a chance of showers and thunderstorms in the afternoon. Some thunderstorms may produce gusty winds and heavy rainfall in the morning. Some thunderstorms may produce gusty winds and heavy rainfall in the afternoon. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 60 percent. Heat index values up to 100 in the afternoon.

Partly cloudy. A chance of showers and thunderstorms in the evening. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Humid with lows around 70. Southwest winds 5 to 10 mph becoming west after midnight. Gusts up to 20 mph. Chance of rain 30 percent.

Sunny with highs in the mid 80s. Northwest winds 5 to 10 mph with gusts up to 20 mph.

Mostly clear. Lows in the mid 60s.

Mostly sunny. Highs in the lower 80s.

Mostly cloudy. A chance of showers. Lows in the upper 60s. Chance of rain 40 percent.

Mostly cloudy with a chance of showers and thunderstorms. Highs in the lower 80s. Chance of rain 50 percent.

Mostly cloudy with a chance of showers and thunderstorms in the evening then partly cloudy after midnight. Lows in the upper 60s. Chance of rain 50 percent.

Mostly sunny. Highs in the lower 80s.

Partly cloudy. Lows in the mid 60s.

Mostly sunny. Highs in the lower 80s.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 60s.

Partly sunny. Highs in the mid 80s.

Clear. Low temperature around 71F. Dew point will be around 66F with an average humidity of 78%. Winds will be 4 mph from the S.

Sunny. High temperature around 83F. Dew point will be around 68F with an average humidity of 72%. Winds will be 3 mph from the SW.

Clear. Low temperature around 73F. Dew point will be around 67F with an average humidity of 77%. Winds will be 3 mph from the SW.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 83F. Dew point will be around 69F with an average humidity of 75%. Winds will be 2 mph from the W.

Mostly clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 72F. Dew point will be around 67F with an average humidity of 78%. Winds will be 1 mph from the NW.