South Boston weather
Loading live data…Light drizzle,warmer tomorrow
NWS, the American and the European model put South Boston's high today between 65° and 70°, a 5° split. Tomorrow looks clear around 78°, with a 1% chance of rain.
Latest for South Boston: NWS (National Blend (NBM)): 69° Clear · American (NOAA GFS): 68° Clear · European (ECMWF): 67° Clear.
South Boston weather in numbers
from 30 years of measured normalsSouth Boston swings 57°F across the year, from 83°F highs in July to 26°F lows in February, and January is usually the wettest month in a year that brings about 51 in of precipitation.
The weather map: all three models at once
NWS, American, European side by side around South Boston and nearby towns.Live rain radar →Next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
14-day forecast
where the models agree, and where they splitSouth Boston, MA is at its warmest in Jul (average highs near 83°F) and coldest in Feb (lows around 26°F), with roughly 51 in of precipitation across the year. Below, compare what NWS, American, European forecast for South Boston right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
South Boston climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in South Boston?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.
What do you think of the forecasts?
your vote countsThe accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.
One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.