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South Boston climate
Typical historical weather for South Boston, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for South Boston.
Annual average
16.2°C
across all months
Warmest month
32.9°C
Jul average high
Coolest month
0.3°C
Jan average low
Annual rainfall
1089mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
39.5°C
24 June 2025
Coldest day
-14.3°C
9 January 2017
Wettest day
105.7mm
11 October 2018
Windiest day
7.8m/s
2 March 2018
See the detail: South Boston on 11 October 2018.