Boston weather in May 2020

  • 20°C maximum daytime temperature in May in Boston20
    20°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Boston11
    11 days with some rainfall
  • 9°C minimum night-time temperature in May in Boston9
    9°C min night temperature
  • 15 hours of daylight per day in May in Boston15
    15 hours of daylight per day
  • No heat & humidity in May in Boston0
    No heat & humidity
  • 85 mm monthly rainfall in May in Boston85
    85 mm of monthly rainfall
  • UV (maximum) index 7 (High) in May in Boston7
    7 (High) UV index
  • 9°C sea temperature in May in Boston9
    9°C sea temperature
  • Top deals & discounts
  • Boston weather overview
  • Boston climate averages by month
  • More destinations
  • Best time to go to Boston
  • Boston 5-day weather forecast

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The May weather guide for Boston, Massachusetts shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

  • Save on hotel stays in Boston, USA with Hilton
  • Browse available hotels on a map to find the perfect location
  • Book online with Hilton Hotels for the lowest price

How hot is it in Boston in May?

Daytime temperatures usually reach 20°C in Boston in May, falling to 9°C at night.

How sunny is it in Boston in May?

There are normally 8 hours of bright sunshine each day in Boston in May - that's 57% of daylight hours.

Is the sea cold around Boston in May?

The average sea temperature around Boston in May is 9°C.

Does it rain in Boston in May?

There are usually 11 days with some rain in Boston in May and the average monthly rainfall is 85mm.

Boston sunrise & sunset times for May 2020

Browse the sunrise & sunset times for Boston in May 2020. Select a month to view Boston sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2020 05:39 19:45
Saturday, 16th May 2020 05:21 20:01
Sunday, 31st May 2020 05:10 20:14
  • Book low fares to Boston with Virgin Atlantic
  • Flights depart from London Heathrow Airport
  • Return flights to Boston from £260

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Discover more about the USA

Where's hot in Massachusetts in May?

Below are average maximum temperatures at popular destinations in Massachusetts in May. Select a destination to see more weather parameters.

More destinations & map >>

Related posts

Popular travel offers

Top ^

*affiliate links: find out how we are funded and why this helps us remain free to use.