Old Lyme (CT) Weather and Climate: A Comprehensive Guide
The temperature in Old Lyme can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and cold during the cooler months.
It also experiences much rain/snowfall throughout the year.
Now, let’s break down all the climate details for a clearer picture.
Average maximum day and minimum night temperature
Visitors to Old Lyme can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 28°C in July. In February, the coolest month of the year, temperatures drop to a chilly 4°C.
At night, you can expect cooler temperatures, with averages dropping to around -5°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
Old Lyme is known for its substantial rain/snowfall, with annual precipitation reaching 1289 mm. Despite minor fluctuations, Old Lyme enjoys fairly consistent precipitation throughout the year. In June, you can expect around 135 mm of precipitation, while in November, Old Lyme receives about 92 mm.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Old Lyme can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.8 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 4.6 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Old Lyme.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 58%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
clear and no rain almost clear and no rain overcast and chance of slight snowForecast for Old Lyme (CT)
6 m/s
3 m/s
3 m/s
The best time of year to visit Old Lyme in the United States of America
During the months of May, June and September you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
July has an average maximum temperature of 28°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 4°C.
June tops the wettest month list with 135 mm of rainfall.
November is the driest month with 92 mm of precipitation.
July is the sunniest month with an average of 293 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
