Brooklyn Weather in September

What's the weather like in Brooklyn (New York) in September 2025?

The climate in Brooklyn during September can be summarized as warm and a little damp.

September is in the fall / autumn in Brooklyn and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 15°C (60°F) is normal.

Brooklyn weather averages (imperial / metric)
Daytime temperature 23.9°C 75°F
Nightly temperature 15.3°C 59.5°F
Average temperature 19.6°C 67.3°F
Daily sunshine 7.9 hrs
Avg rainfall 89 mm 3.5 ins
Rainy days 8 days
Sea temperature 20.6°C 69.1°F
Humidity 70%
Windspeed 16.9kph 11 mph

On average September is the 5th driest month of the year in Brooklyn with around 89mm 3.5 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 7.9 hours of sunshine per day.

September temperatures in Brooklyn

Brooklyn average temperature in September

September rainfall

Brooklyn average rain in September

September hourly sunshine

Brooklyn 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 Brooklyn 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

Brooklyn weather stats

Brooklyn weather statistics
Hottest month: July 28.4°C 83.1°F
Driest month: October 80mm 3.1ins
Sunniest month: August 9.2hrs
Coldest month: January 2.6°C 36.7°F
Wettest month: July 106mm 4.2ins
Map showing location of Brooklyn (40.6501, -73.94958) Brooklyn map pin © Google

Locations nearby

Top United States locations