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The Weather in Boston in May

Updated: January 24, 2024

This post is an overview of the May weather in Boston, with tips on how to dress and things to do to help make the most of your trip.

We also list some of the best things to do in May in Boston.


May is an excellent time to visit Boston as daytime high temperatures will be warming from the low-60s F (16 to 17 C) early in the month into the low-70s F (21 to 22 C) by the month’s end.

A couple of the warmer afternoons later in the month can reach up into the mid-80s F (28 to 29 C).

The highest temperature recorded in Boston during May was 95 F (35 C).

Average Temps in Boston in May

Late night and early morning low temperatures are mostly in the mid-40s F (7 to 8 C) early in May but warm to the mid-50s F (12 to 13 C) by the end of the month.

A few of the more chilly mornings can dip down to near 40 F (4 to 5 C). The record low temperature for Boston during May was 34 F (1.1 C).

Boston Walking Tours


During May skies will be clear or at least partly sunny for about 16 days so there should be ample time to explore this city.

About 8-10 days will record at least 0.04 inches (1 mm) or more of rain.

Snow does not normally occur during May in Boston.

How Much Sun and Rain in Boston in May

Daylight hours increase during the month from a little over 14 hours on May 1st to just over 15 hours on the 31st.

Seasonal Outlook - April to June 2024 Boston

There is a 74% chance for normal to above-normal temperatures with near-normal rainfall.


May is mostly Spring-like with a few summer-like days, especially during the second half of the month.

You should consider at least one lightweight jacket and/or windbreaker for the cooler days and evenings while a sweater might be all you need for most days.

What to Wear in May in Boston

Some summer attire will come in handy for the few warmer days late in the month. Bring an umbrella for rainy days and don’t forget some good walking shoes.


Below we list some of the highlights of events and activities that take place in Boston during May.

For a fuller list of events this month, read our post on what to do in Boston in May, which includes free things to do, night and family-friendly activities and attractions.

Check out our definitive post on the best things to do in Boston year-round.

And if you are planning on visiting many of Boston’s top attractions, then you should consider a tourist discount pass.

These passes could save you up to 50% of retail ticket prices for tours, attractions, and restaurants.

  • Attend the Free MayFair at Harvard Square
  • Go to the Boston Calling Music Festival
  • Enjoy ArtWeek Boston
  • Commemorate Memorial Day at the Garden of Flags
  • Take a Free Walking Tour 
  • Visit Martha's Vineyard on a Day Trip
  • Catch a Red Sox Game
  • Celebrate Mother's Day on a Brunch Cruise
  • Go to the Nantucket Wine Festival

Be sure to check out all the top things to do in May in our main post.

About The Author

Brian Burgess

I was born in Cambridge and have been living in the Boston area all my life. I am a graduate of Boston's Emerson College with a degree in communications with a journalism/history focus. I have been leading tours for Free Tours By Foot Boston since it was started in the city of Boston in 2012, and enjoy sharing my knowledge of Boston's rich history with not only the guests on my tours, but with everyone I meet. <a href="" Read More...
Updated: January 24th, 2024
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