Live Weather & Forecast
Weather in South Boston
Massachusetts, United States · Real-time conditions & 3-day outlook
9°C
Feels like 9°C
49°F / Feels 49°F
Partly cloudy
South Boston, Massachusetts
🌞 Daytime
Updated: 2026-04-12 13:30
Humidity
34%
Wind
4.3 km/h SSE
Wind Gust
5 km/h
Pressure
1033 mb
Visibility
16 km
UV Index
5.9
(Moderate)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
-6.4°C
Wind Degree
156°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
213.9 μg/m³
NO₂
10.7 μg/m³
O₃
100 μg/m³
SO₂
3.6 μg/m³
PM 2.5
8 μg/m³
PM 10
9 μg/m³
Today's Hourly Forecast
24-hour breakdown for South Boston, Massachusetts
12 AM
7°
Clear
1 AM
5°
Clear
2 AM
4°
Clear
3 AM
3°
Clear
4 AM
2°
Clear
5 AM
2°
Clear
6 AM
2°
Clear
7 AM
4°
Sunny
8 AM
6°
Sunny
9 AM
8°
Sunny
10 AM
10°
Sunny
11 AM
11°
Sunny
12 PM
12°
Sunny
1 PM
9°
Partly cloudy
2 PM
11°
Sunny
3 PM
11°
Sunny
4 PM
11°
Sunny
5 PM
11°
Sunny
6 PM
11°
Overcast
7 PM
10°
Overcast
8 PM
9°
Overcast
9 PM
9°
Overcast
10 PM
8°
Overcast
11 PM
7°
Overcast
3-Day Forecast
Daily overview for South Boston, Massachusetts
Today
Sunny
12°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 41%
💨 Max wind: 18.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:08 AM
🌇 Sunset: 07:23 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
15°
/
5°
🌧️ 84% chance of rain
💧 Avg. humidity: 83%
💨 Max wind: 25.2 km/h
🌧️ Total precip: 8.84 mm
☀️ UV Index: 0.4
🌅 Sunrise: 06:06 AM
🌇 Sunset: 07:24 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
23°
/
14°
🌧️ 0% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 18.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:05 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit South Boston
Plan your trip to South Boston, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in South Boston?
Current conditions in South Boston: Partly cloudy, temperature 9°C, humidity 34%.
What is the best time to visit South Boston?
The best time to visit South Boston is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in South Boston?
South Boston is located at approximately 42.3° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in South Boston?
The wettest period in South Boston is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to South Boston?
For visits to South Boston during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is South Boston in?
South Boston is located in United States, in the state of Massachusetts.
What are the public holidays in South Boston in 2026?
View the 2026 public holidays for South Boston on our Holidays page.
What are the GPS coordinates used for the weather forecast in South Boston?
The weather forecast for South Boston uses coordinates 42.3334, -71.0495.