United StatesAverage weather for Boston in May
It's pleasantly warm in May in Boston with an average temperature of 20°C. Temperatures this month range from a low of 15°C to a high of 25°C. At night, you can expect temperatures between 7°C and 16°C.
Start of May
The month of May starts in Boston with cool temps, averaging around 17°C during the day and nights around 8°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
Mid May
By mid-May, daytime temps rise to around 21°C, with nights around 11°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Boston is around 24°C, while nighttime temps are about 14°C. A shower might pop up, but overall, the weather will be dry and sunny.
In May, there is an average of 69 mm of precipitation, spread over 10 days. Of the total precipitation, about 0,1 cm falls as snow in May. The wind speed is around 4 Bft, mostly coming from the South.
Boston in May |
New York | ||
|---|---|---|---|
 Average temperature |
20°C | 22°C | |
 Max. temperature |
25°C | 28°C | |
| Min. temperature |
15°C | -5°C | |
 Total precipitation |
69 mm | 105 mm | |
| Rainy days |
10 days | 14 days | |
 Total snowfall |
0,1 cm | 0 cm | |
| Snowy days |
1 day | 0 days | |
April
UV index
The UV index is a maximum of 6 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Is May a good time to visit Boston?
Looking for great weather? May is a good time to be in Boston. The temperatures are nice, and there’s not too much rain.
Temperature records
With 33°C in 2020, Boston reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 5°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -2°C to a highest value of 23°C.
Check out the climate of Boston for all months and discover the best travel time
Daily Temperature in May in Boston
This chart shows the average daily high and low temperatures in May for Boston, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Boston
The chart below shows the average daily precipitation in May for Boston, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 10 days of precipitation in Boston.
Daily Snowfall in May in Boston
This chart shows the average daily snowfall in May in Boston, measured in centimeters. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in May.
Daily UV index in May in Boston
This chart shows the average daily UV index in May in Boston, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Boston over the years
This chart shows the average temperature in May in Boston, measured in degrees Celsius, over the past few years.
Total precipitation in May in Boston over the years
This chart shows the average precipitation in May in Boston, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Snowfall in May in Boston per year
This chart shows the average snowfall in May in Boston, measured in centimeters, over the past few years.
Daily weather in May for Boston
Click on any day in May to get detailed info about the usual weather on that day in Boston. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Boston
Have you been to Boston in May?
Share your weather experience in May in Boston.
Average weather in Boston by month
Click on a month below to see detailed weather info for Boston. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
