Bartlesville Weather in September

What's the weather like in Bartlesville (Oklahoma) in September 2025?

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

September is in the fall / autumn in Bartlesville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (84°F), whilst at night 15°C (60°F) is normal.

Bartlesville weather averages (imperial / metric)
Daytime temperature 28.7°C 83.7°F
Nightly temperature 15.3°C 59.5°F
Average temperature 22°C 71.6°F
Daily sunshine 8.4 hrs
Avg rainfall 110 mm 4.3 ins
Rainy days 8 days
Sea temperature 21.9°C 71.5°F
Humidity 70%
Windspeed 15.8kph 10 mph

On average September is the 3rd wettest month of the year in Bartlesville with around 110mm 4.3 inches of rain making it a 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 8.4 hours of sunshine per day.

September temperatures in Bartlesville

Bartlesville average temperature in September

September rainfall

Bartlesville average rain in September

September hourly sunshine

Bartlesville 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 Bartlesville 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

Bartlesville weather stats

Bartlesville weather statistics
Hottest month: July 33.8°C 92.8°F
Driest month: January 33mm 1.3ins
Sunniest month: July 11.5hrs
Coldest month: January 6.6°C 43.9°F
Wettest month: May 125mm 4.9ins
Map showing location of Bartlesville (36.74731, -95.98082) Bartlesville map pin © Google

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