Swampscott Weather in September

What's the weather like in Swampscott (Massachusetts) in September 2025?

The climate in Swampscott during September can be summarized as mild and a little damp.

September is in the fall / autumn in Swampscott and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 13°C (55°F) is normal.

Swampscott weather averages (imperial / metric)
Daytime temperature 22.6°C 72.6°F
Nightly temperature 12.9°C 55.1°F
Average temperature 17.7°C 63.9°F
Daily sunshine 8.3 hrs
Avg rainfall 84 mm 3.3 ins
Rainy days 8 days
Sea temperature 16.5°C 61.6°F
Humidity 73%
Windspeed 15.1kph 9 mph

On average September is the 5th driest month of the year in Swampscott with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.3 hours of sunshine per day.

September temperatures in Swampscott

Swampscott average temperature in September

September rainfall

Swampscott average rain in September

September hourly sunshine

Swampscott average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Swampscott in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Swampscott weather stats

Swampscott weather statistics
Hottest month: July 27.5°C 81.5°F
Driest month: July 72mm 2.8ins
Sunniest month: July 10.1hrs
Coldest month: January 1.6°C 34.9°F
Wettest month: November 113mm 4.4ins
Map showing location of Swampscott (42.47093, -70.91755) Swampscott map pin © Google

Locations nearby

Top United States locations