Lexington (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Lexington.
Climate overview of Lexington
Temperatures in Lexington, Massachusetts, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while January is the coldest at 2°C (36°F).
Rain/snowfall is high, totalling around 1223 mm (48 in) per year. December is the wettest month and September the driest. The city also experiences warm summers and cold winters. The sunniest month is May, with 10.0 hours of sunshine per day on average.
Lexington Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lexington - and find the best time to visit.
Monthly Temperature in Lexington
The climate in Lexington is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a chilly 2°C (36°F) during cooler months like January.
At night, you can expect temperatures ranging from 17°C (63°F) in July to around -8°C (18°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Lexington
Lexington has a notably wet climate with abundant precipitation, recording 1223 mm (48 in) of rain/snowfall per year. Year-round, Lexington has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 131 mm (5.2 in), and the driest month, September, with 81 mm (3.2 in), is minimal. For more details, please visit our Lexington Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Lexington
Seasonal changes in sunshine hours are quite dramatic in Lexington. While May receives considerable daily sunshine with up to 10.0 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.7 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
Water Temperature in Lexington
The mean water temperature over the year ranges from 4°C (39°F) in February to 20°C (68°F) in August.
Water temperature over the year
Humidity in Lexington by Month
The relative humidity is high throughout the year in Lexington.
The city experiences its highest humidity in August, reaching 72%. In February, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Lexington
The mean wind speed varies between 5 m/s (10 knots) and 7 m/s (14 knots) throughout the year. It is lowest in June, July, August and September and highest during January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Lexington
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July, August and September
- Warmest weather: July and August
- Most sunshine: May and July
- Best for swimming: August, with water temperatures around 20°C (68°F).
- Seasonal pattern: Warm summers and cold winters
- Coldest conditions: January, with freezing nights around -8°C (18°F).
Frequently asked questions about the climate in Lexington
What is the best time to visit Lexington?
May, July, August and September typically offer the most optimal weather in Lexington. In contrast, January, February, March and December tend to have less optimal conditions. Lexington has warm summers and cold winters.
What temperatures can I expect in Lexington?
Daytime highs range from 2°C (36°F) in January to 29°C (84°F) in July. Nighttime lows range from -8°C (18°F) to 17°C (63°F). Temperatures vary considerably through the year.
How much rain does Lexington get?
Annual rainfall is around 1223 mm (48 in). December is the wettest month with 131 mm (5.2 in), while September is the driest with 81 mm (3.2 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Lexington?
Lexington receives around 2,665 hours of sunshine per year. May is the sunniest month with 301 hours, while December is the cloudiest with just 141 hours. Overall, Lexington enjoys abundant sunshine.
Lexington 3-Day Forecast
Lexington (MA) 3-Day Forecast
Lexington on the map
Lexington is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.