Sulphur Weather in September

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

The climate in Sulphur during September can be summarized as hot and damp.

September is in the fall / autumn in Sulphur and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 29°C (85°F), whilst at night 17°C (62°F) is normal.

Sulphur weather averages (imperial / metric)
Daytime temperature 29.2°C 84.6°F
Nightly temperature 16.8°C 62.2°F
Average temperature 23°C 73.4°F
Daily sunshine 9 hrs
Avg rainfall 112 mm 4.4 ins
Rainy days 8 days
Sea temperature 23.2°C 73.8°F
Humidity 68%
Windspeed 16.2kph 10 mph

On average September is the 2nd wettest month of the year in Sulphur with around 112mm 4.4 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 9 hours of sunshine per day.

September temperatures in Sulphur

Sulphur average temperature in September

September rainfall

Sulphur average rain in September

September hourly sunshine

Sulphur 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 Sulphur 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

Sulphur weather stats

Sulphur weather statistics
Hottest month: July 33.7°C 92.7°F
Driest month: January 40mm 1.6ins
Sunniest month: July 11.8hrs
Coldest month: January 9.4°C 48.9°F
Wettest month: May 147mm 5.8ins
Map showing location of Sulphur (34.50787, -96.96835) Sulphur map pin © Google

Locations nearby

Top United States locations