Allentown Weather in September

What's the weather like in Allentown (Pennsylvania) in September 2024?

The climate in Allentown during September can be summarized as warm and damp.

September is in the fall / autumn in Allentown and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 12°C (54°F) is normal.

Allentown weather averages (imperial / metric)
Daytime temperature 24.1°C 75.3°F
Nightly temperature 12.2°C 53.9°F
Average temperature 18.1°C 64.6°F
Daily sunshine 7.6 hrs
Avg rainfall 101 mm 4 ins
Rainy days 9 days
Sea temperature 21°C 69.9°F
Humidity 74%
Windspeed 13kph 8 mph

On average September is the 4th wettest month of the year in Allentown with around 101mm 4 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.6 hours of sunshine per day.

September temperatures in Allentown

Allentown average temperature in September

September rainfall

Allentown average rain in September

September hourly sunshine

Allentown 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 Allentown in September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Allentown weather stats

Allentown weather statistics
Hottest month: July 28.9°C 84°F
Driest month: February 75mm 3ins
Sunniest month: July 9.7hrs
Coldest month: January 1.5°C 34.7°F
Wettest month: August 110mm 4.3ins
Map showing location of Allentown (40.60843, -75.49018) Allentown map pin © Google

Locations nearby

Top United States locations