Rockwall Weather in September

What's the weather like in Rockwall (Texas) in September 2025?

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

September is in the fall / autumn in Rockwall and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 31°C (87°F), whilst at night 19°C (66°F) is normal.

Rockwall weather averages (imperial / metric)
Daytime temperature 30.8°C 87.4°F
Nightly temperature 18.9°C 65.9°F
Average temperature 24.8°C 76.6°F
Daily sunshine 8.7 hrs
Avg rainfall 96 mm 3.8 ins
Rainy days 7 days
Sea temperature 25.5°C 77.9°F
Humidity 69%
Windspeed 14.8kph 9 mph

On average September is the 4th wettest month of the year in Rockwall with around 96mm 3.8 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 8.7 hours of sunshine per day.

September temperatures in Rockwall

Rockwall average temperature in September

September rainfall

Rockwall average rain in September

September hourly sunshine

Rockwall 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 Rockwall 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

Rockwall weather stats

Rockwall weather statistics
Hottest month: July 34.6°C 94.3°F
Driest month: January 54mm 2.1ins
Sunniest month: July 11.3hrs
Coldest month: January 11.5°C 52.7°F
Wettest month: May 138mm 5.4ins
Map showing location of Rockwall (32.93123, -96.45971) Rockwall map pin © Google

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