Chatham, MA has a longitude of -70.0 degrees and a latitude of 41.7 degrees.
Chatham, MA has temperatures that can go as high as 69.2 °F in June, 76.2 °F in July, and 75.9 °F in August. The hottest month is typically July.
Chatham, MA also has temperatures that can go as low as 30.2 °F in December, 26.0 °F in January, and 26.0 °F in February. The coldest month is typically February.
The wettest month for Chatham, MA is March with 14.1 inches of rain.
The annual weather and monthly temperature averages for highs and lows are presented in the table below. The weather values used to interpolate these values are provided by the US NAOO weather station values from the last 10 years.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Average High (°F) | 39.2 | 39.3 | 43.4 | 52.3 | 60.2 | 69.2 | 76.2 | 75.9 | 70.3 | 61.0 | 51.8 | 42.8 |
| Average Low (°F) | 26.0 | 26.0 | 31.4 | 39.2 | 48.2 | 57.2 | 62.6 | 62.6 | 57.2 | 47.6 | 40.4 | 30.2 |
| Average Precipitation (in) | 10.3 | 8.3 | 14.1 | 10.5 | 10.0 | 8.8 | 7.8 | 7.9 | 10.2 | 10.1 | 11.3 | 12.6 |
Most of Massachusetts has a humid continental climate, with cold winters and warm summers. Far southeast coastal areas are the broad transition zone to Humid Subtropical climates. Frosts are frequent all winter, even in coastal areas due to prevailing inland winds. Due to its location near the Atlantic, Massachusetts is vulnerable to hurricanes and tropical storms.
In reality, each climate is unique and finding one that is suitable can be a real challenge! We hope that the information here can be the starting point of your weather and climate research for your next vacation or potentially next home.
We hope you use this information to make your travel plans to Chatham, MA or decide if living in the Chatham climate is the right choice for you!