Chatham (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Chatham.
Climate overview of Chatham
Temperatures in Chatham, Massachusetts, United States of America, vary greatly throughout the year. July is the hottest month at 25°C (77°F), while February is the coldest at 3°C (37°F).
The city receives considerable rain/snowfall, with around 1172 mm (46 in) annually. December is the wettest month. July is the sunniest month, averaging 10.0 hours of sunshine per day.
Chatham Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chatham — and find the best time to visit.
Monthly Temperature in Chatham
The climate in Chatham is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 25°C (77°F) in July to a chilly 3°C (37°F) in the coolest month, February.
Nights vary from 18°C (64°F) in July to around -4°C (25°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Chatham
Chatham has a notably wet climate with abundant precipitation, recording 1172 mm (46 in) of rain/snowfall per year. Chatham offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month December (128 mm (5 in)) and the driest month August (71 mm (2.8 in)) is not too significant. For more details, please visit our Chatham 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 Chatham
For those who appreciate different seasons, Chatham serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 10.0 hours of sunshine daily, and embrace the darker days in January, offering only 4.9 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Chatham
Frequently asked questions about the climate in Chatham
What is the best time to visit Chatham?
June, July, August and September typically offer the most optimal weather in Chatham. In contrast, January, February, March, November and December tend to have less optimal conditions.
What temperatures can I expect in Chatham?
Daytime highs range from 3°C (37°F) in February to 25°C (77°F) in July. Nighttime lows range from -4°C (25°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Chatham get?
Annual rainfall is around 1172 mm (46 in). December is the wettest month with 128 mm (5 in), while August is the driest with 71 mm (2.8 in).
How sunny is Chatham?
Chatham receives around 2,605 hours of sunshine per year. July is the sunniest month with 301 hours, while January is the cloudiest with just 147 hours. Overall, Chatham enjoys abundant sunshine.
Chatham 3-Day Forecast
Chatham (MA) 3-Day Forecast
Chatham on the map
Chatham is highlighted — select any city to see its climate.
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