United States · 1991–2020 normal

South Boston in
August.

Typical August weather in South Boston: 27°C by day, 18.5°C at night, 80 mm of rain over 7 wet days. These are measured 1991–2020 station normals, not a forecast.

Typical high27°C
Typical low18.5°C
Rain80 mm
Wet days7

In the year-round weather comparison, August scores 74 out of 100 (September leads the year at 85). Daylight is calculated as 13 h 53 from latitude 42.33°. Open-water sea temperature is 18.8°C (15 km from the place centre).

August at a glance

What is South Boston like in August?

Plain answers from the measured climate record—not a forecast or a promise about a particular trip.

Is South Boston hot in August?

Days are typically warm at 27°C, while nights average 18.5°C.

Does it rain much?

The measured monthly average is 80 mm across about 7 wet days.

How much daylight is there?

There are about 13 h 53 between sunrise and sunset at mid-month, calculated from the place latitude.

Is August a good time to visit?

August ranks 3 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.
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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.

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