Alexandria Weather in September

What's the weather like in Alexandria (Virginia) in September 2025?

The climate in Alexandria during September can be summarized as warm, humid and a little damp.

September is in the fall / autumn in Alexandria and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (79°F), whilst at night 16°C (61°F) is normal.

Alexandria weather averages (imperial / metric)
Daytime temperature 26.3°C 79.3°F
Nightly temperature 15.9°C 60.6°F
Average temperature 21.1°C 70°F
Daily sunshine 8.1 hrs
Avg rainfall 84 mm 3.3 ins
Rainy days 7 days
Sea temperature 22.1°C 71.7°F
Humidity 72%
Windspeed 12.6kph 8 mph

On average September is the 4th wettest month of the year in Alexandria with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 hours of sunshine per day.

September temperatures in Alexandria

Alexandria average temperature in September

September rainfall

Alexandria average rain in September

September hourly sunshine

Alexandria 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 Alexandria in September 2025.

Other monthly averages

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UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Alexandria weather stats

Alexandria weather statistics
Hottest month: July 30.6°C 87.1°F
Driest month: January 68mm 2.7ins
Sunniest month: June 10.1hrs
Coldest month: January 5.4°C 41.7°F
Wettest month: August 104mm 4.1ins
Map showing location of Alexandria (38.80484, -77.04692) Alexandria map pin © Google

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