Is South Boston hot in May?
Days are typically mild at 19.3°C, while nights average 10.2°C.
United States · 1991–2020 normal
South Boston in
May.
Typical May weather in South Boston: 19.3°C by day, 10.2°C at night, 83 mm of rain over 9.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high19.3°C
Typical low10.2°C
Rain83 mm
Wet days9.3
In the year-round weather comparison, May scores 64 out of 100 (September leads the year at 85). Daylight is calculated as 14 h 34 from latitude 42.33°. Open-water sea temperature is 10.1°C (15 km from the place centre).
May at a glance
What is South Boston like in May?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 83 mm across about 9 wet days.
How much daylight is there?
There are about 14 h 34 between sunrise and sunset at mid-month, calculated from the place latitude.
Is May a good time to visit?
May ranks 5 of 12 in our weather comparison; September ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4951305
- NOAA station
- USW00014739 · BOSTON
- Station distance
- 4.5 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for South Boston is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
How travel partnerships will work