Arnett Weather in September

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

The climate in Arnett during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Arnett and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (83°F), whilst at night 14°C (58°F) is normal.

Arnett weather averages (imperial / metric)
Daytime temperature 28.6°C 83.4°F
Nightly temperature 14.3°C 57.7°F
Average temperature 21.4°C 70.5°F
Daily sunshine 9.5 hrs
Avg rainfall 51 mm 2 ins
Rainy days 7 days
Sea temperature 21.1°C 70°F
Humidity 63%
Windspeed 20.5kph 13 mph

On average September is the 5th wettest month of the year in Arnett with around 51mm 2 inches of rain making it a reasonably dry 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 9.5 hours of sunshine per day.

September temperatures in Arnett

Arnett average temperature in September

September rainfall

Arnett average rain in September

September hourly sunshine

Arnett 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 Arnett 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

Arnett weather stats

Arnett weather statistics
Hottest month: July 34.3°C 93.7°F
Driest month: January 13mm 0.5ins
Sunniest month: July 12.3hrs
Coldest month: January 7.8°C 46°F
Wettest month: May 101mm 4ins
Map showing location of Arnett (36.13504, -99.77484) Arnett map pin © Google

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