Columbia Weather in September

What's the weather like in Columbia (Maryland) in September 2025?

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

September is in the fall / autumn in Columbia and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 26°C (78°F), whilst at night 14°C (56°F) is normal.

Columbia weather averages (imperial / metric)
Daytime temperature 25.5°C 77.9°F
Nightly temperature 13.5°C 56.3°F
Average temperature 19.5°C 67.1°F
Daily sunshine 7.9 hrs
Avg rainfall 95 mm 3.7 ins
Rainy days 8 days
Sea temperature 21.1°C 70°F
Humidity 72%
Windspeed 12.6kph 8 mph

On average September is the 6th wettest month of the year in Columbia with around 95mm 3.7 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 Columbia

Columbia average temperature in September

September rainfall

Columbia average rain in September

September hourly sunshine

Columbia 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 Columbia 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

Columbia weather stats

Columbia weather statistics
Hottest month: July 30°C 86°F
Driest month: February 74mm 2.9ins
Sunniest month: July 9.9hrs
Coldest month: January 4°C 39.2°F
Wettest month: May 112mm 4.4ins
Map showing location of Columbia (39.24038, -76.83942) Columbia map pin © Google

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