Frederick Weather in September

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

The climate in Frederick during September can be summarized as hot and a little damp.

September is in the fall / autumn in Frederick and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (87°F), whilst at night 17°C (62°F) is normal.

Frederick weather averages (imperial / metric)
Daytime temperature 30.3°C 86.5°F
Nightly temperature 16.7°C 62.1°F
Average temperature 23.5°C 74.3°F
Daily sunshine 9.4 hrs
Avg rainfall 85 mm 3.4 ins
Rainy days 7 days
Sea temperature 22.6°C 72.6°F
Humidity 65%
Windspeed 18.7kph 12 mph

On average September is the 3rd wettest month of the year in Frederick with around 85mm 3.4 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 9.4 hours of sunshine per day.

September temperatures in Frederick

Frederick average temperature in September

September rainfall

Frederick average rain in September

September hourly sunshine

Frederick 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 Frederick 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

Frederick weather stats

Frederick weather statistics
Hottest month: July 35.7°C 96.3°F
Driest month: January 21mm 0.8ins
Sunniest month: July 12.3hrs
Coldest month: January 10.3°C 50.5°F
Wettest month: May 111mm 4.4ins
Map showing location of Frederick (34.39203, -99.01841) Frederick map pin © Google

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