Sudbury (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sudbury.
Climate overview of Sudbury
Sudbury, Massachusetts, United States of America, sees big temperature differences between seasons, with July peaking at 29°C (84°F) and January dropping to 2°C (36°F).
Rain/snowfall is high, totalling around 1233 mm (49 in) per year. December is the wettest month and January the driest. The city also experiences warm summers and cold winters. The most sunshine falls in May, with an average of 10.0 hours of daily sunshine.
Sudbury Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sudbury - and find the best time to visit.
Monthly Temperature in Sudbury
Visitors to Sudbury can expect significant temperature changes throughout the year. 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 Sudbury
Sudbury is known for its substantial rain/snowfall, with annual precipitation reaching 1233 mm (49 in). Year-round, Sudbury has a balanced climate with minimal variation in precipitation. The difference between the wettest month, December, with 129 mm (5.1 in), and the driest month, January, with 85 mm (3.3 in), is minimal. For more details, please visit our Sudbury 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 Sudbury
Seasonal changes in sunshine hours are quite dramatic in Sudbury. 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
Humidity in Sudbury by Month
The relative humidity is high throughout the year in Sudbury.
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
Best Time to Visit Sudbury
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 and September
- Warmest weather: July and August
- Most sunshine: May and July
- 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 Sudbury
What is the best time to visit Sudbury?
May, July and September typically offer the most optimal weather in Sudbury. In contrast, January, February, March and December tend to have less optimal conditions. Sudbury has warm summers and cold winters.
What temperatures can I expect in Sudbury?
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 Sudbury get?
Annual rainfall is around 1233 mm (49 in). December is the wettest month with 129 mm (5.1 in), while January is the driest with 85 mm (3.3 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Sudbury?
Sudbury 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, Sudbury enjoys abundant sunshine.
Sudbury 3-Day Forecast
Sudbury on the map
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Popular this month
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Kissimmee
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