Gettysburg Weather in September

What's the weather like in Gettysburg (Pennsylvania) in September 2025?

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

September is in the fall / autumn in Gettysburg and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (77°F), whilst at night 12°C (53°F) is normal.

Gettysburg weather averages (imperial / metric)
Daytime temperature 24.8°C 76.6°F
Nightly temperature 11.8°C 53.2°F
Average temperature 18.3°C 64.9°F
Daily sunshine 7.9 hrs
Avg rainfall 98 mm 3.8 ins
Rainy days 9 days
Sea temperature 21.4°C 70.6°F
Humidity 74%
Windspeed 11.9kph 7 mph

On average September is the 2nd wettest month of the year in Gettysburg with around 98mm 3.8 inches of rain making it a a little 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 7.9 hours of sunshine per day.

September temperatures in Gettysburg

Gettysburg average temperature in September

September rainfall

Gettysburg average rain in September

September hourly sunshine

Gettysburg 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 Gettysburg 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

Gettysburg weather stats

Gettysburg weather statistics
Hottest month: July 29.7°C 85.5°F
Driest month: February 74mm 2.9ins
Sunniest month: July 10.1hrs
Coldest month: January 2.7°C 36.9°F
Wettest month: June 103mm 4.1ins
Map showing location of Gettysburg (39.83093, -77.2311) Gettysburg map pin © Google

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