Old Lyme, CT has a humid continental climate, with warm summers and cold winters. The average temperature in the summer months is around 70 degrees Fahrenheit, while in the winter months it averages around 28 degrees Fahrenheit. The area receives considerable amounts of precipitation throughout the year, with most months receiving at least three inches. During the spring and fall months, Old Lyme sometimes experiences thunderstorms and heavy rainfall. Snowfall varies greatly from year to year but typically falls between 20-30 inches annually. In general, Old Lyme has four distinct seasons that can be enjoyed by outdoor adventurers and nature enthusiasts alike.
Old Lyme, Connecticut gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Old Lyme averages 26 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 194 sunny days per year in Old Lyme. The US average is 205 sunny days.
Old Lyme gets some kind of precipitation, on average, 118 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 80 degrees
Winter Low: the January low is 23
Rain: averages 48 inches of rain a year
Snow: averages 26 inches of snow a year