The best time to visit South Boston
Month-by-month climate averages for South Boston, MA, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit South Boston is usually May, June, August and September, when daytime highs sit in the pleasant 60-78°F range and the heaviest January rain is behind you.
South Boston is warmest in July (highs near 83°F) and coldest in February (lows around 26°F), with roughly 51 inches of precipitation across the year and January the wettest month. The sweet spot for most visitors is May, June, August and September. Expect overnight frost in January, February and December.
These are long-run averages. For the actual days you are travelling, check the live South Boston forecast — and note how much the models agree, because that tells you how much to trust it.
South Boston weather by month
what to expect in South Boston through the yearHere is South Boston's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to South Boston by season.