What is the Hottest Month in Massachusetts?

The hottest month in Massachusetts is typically July. During this month, Massachusetts experiences an average high of 82°F and a low of 66°F.

Here are the average high and low temperatures in Massachusetts for the months of June, July, and August:


Average High: 75°F to 80°F

Average Low: 55°F to 60°F


Average High: 80°F to 85°F

Average Low: 60°F to 65°F


Average High: 78°F to 83°F

Average Low: 58°F to 63°F

These temperatures can vary depending on the specific location within Massachusetts, with coastal areas generally being cooler than inland regions.

The hottest month on record in Massachusetts was July 2020. During this month, temperatures soared across the state, with many areas experiencing extreme heat.

The average high during July 2020 was around 85°F to 90°F while the average low was around 65°F to 70°F. This record was part of a trend of increasing temperatures attributed to climate change.

The highest temperature ever recorded in Massachusetts was 107°F. This record was set in Chester and New Bedford on August 2, 1975, during a major heatwave.

The record high temperature ever recorded in Boston, Massachusetts, was 104°F. This record was set on July 4, 1911, during a historic heatwave that affected much of the northeastern United States.

What Areas of Massachusetts Are Hottest in Summer?

During the summer, inland areas of Massachusetts, particularly those farther away from the moderating influence of the ocean, tend to experience the highest temperatures.

Cities and towns located in the interior regions of the state, away from the coast, often see hotter temperatures during the summer months.

Some of the hottest areas in Massachusetts during the summer include:

Merrimack Valley: Cities and towns along the Merrimack River, such as Lawrence, Lowell, and Haverhill, can experience relatively high temperatures due to their inland location.

MetroWest: The MetroWest region, which includes cities like Worcester, Framingham, and Marlborough, can also have hot summers, especially in urban areas.

Cities and inland regions are often the hottest in summer.

Pioneer Valley: Cities and towns in the Pioneer Valley, such as Springfield and Northampton, can experience warm to hot temperatures during the summer months, particularly in the Connecticut River valley.

Central Massachusetts: Inland areas of central Massachusetts, away from coastal influences, can also have hot summers. This includes cities like Fitchburg, Leominster, and Gardner.

What Areas of Massachusetts Are Coolest in Summer?

During the summer, coastal areas of Massachusetts tend to be cooler compared to inland regions. This is due to the moderating influence of the ocean, which helps regulate temperatures.

Areas along the coast, including Cape Cod, Martha’s Vineyard, and Nantucket, often experience cooler temperatures during the summer months due to sea breezes and the presence of the cool ocean waters.

A beach in Cape Cod

Additionally, higher elevation areas in western Massachusetts, such as the Berkshire Mountains, can also be relatively cooler during the summer compared to low-lying areas in the eastern part of the state.

The elevation helps mitigate some of the heat, providing cooler temperatures and often more comfortable conditions for outdoor activities.

Overall, if you’re looking for cooler temperatures during the summer in Massachusetts, coastal areas and higher elevation regions in the western part of the state are good places to consider.

Is Massachusetts Getting Hotter?

Massachusetts, like many other regions around the world, is experiencing warming temperatures as a result of climate change.

Over the past century, temperatures in Massachusetts have been increasing, with more frequent heatwaves and higher average temperatures during all seasons, including summer.

The Environmental Protection Agency states:

“the climate of Massachusetts is changing. The commonwealth has warmed by more than two degrees in the last century. Throughout the northeastern United States, spring is arriving earlier and bringing more precipitation, heavy rainstorms are more frequent, and summers are hotter and drier.”

This warming trend is consistent with global climate change patterns and is driven by human activities such as the burning of fossil fuels, deforestation, and industrial processes, which release greenhouse gases like carbon dioxide into the atmosphere.

The impacts of climate change in Massachusetts include not only warmer temperatures but also changes in precipitation patterns, sea-level rise, and more frequent extreme weather events.

If you’re wondering what the upcoming summer will be like, check out this article on the summer forecast for New England. For a list of ways to keep cool this summer, check out this article on summer attractions in Massachusetts.

Jacobson, Seth. “How hot is this heat wave? Comparing this summer’s temps to other years in Massachusetts?” Wicked Local, 8 Aug. 2022, wickedlocal.com/story/regional/massachusetts/2022/08/08/massachusetts-heat-wave-all-time-temperature-summer-hottest-boston-july-august-water-electrolytes/10265505002/
“Boston – Highest Temperature for Each Year.” Current Results, currentresults.com/Yearly-Weather/USA/MA/Boston/extreme-annual-boston-high-temperature.php
McCorkindale, Emma and Kate Wilkinson. “Massachusetts had its sixth hottest year on record in 2022.” WWLP, wwlp.com/weather/weather-news/massachusetts-had-its-sixth-hottest-year-on-record-in-2022/

About William Briscoe

William Briscoe is a seasoned travel blogger and adventurer based in Massachusetts. With a passion for exploring hidden gems and sharing his travel experiences, Briscoe's website, "Mass Attractions," has become a go-to resource for those seeking seasonal attractions in Massachusetts. William enjoys exploring the scenic beauty of New England, spending time with his family and two rescue dogs, and experimenting with classical New England recipes in his kitchen. He holds a degree in English Literature from Boston University, which he believes laid the foundation for his writing skills.

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