Rockwall (TX) Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very hot to moderate in Rockwall. Average daytime temperatures reach a very hot 36°C (97°F) in August. In January, the coolest month of the year, temperatures drop to a moderate 13°C (55°F).

At night, temperatures range from around 24°C (75°F) in August to 1°C (34°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Rockwall has a relatively rain/snowy climate with high precipitation levels, averaging 1064 mm (42 in) of rain/snowfall annually. Rockwall can be quite wet during May, receiving approximately 151 mm (5.9 in) of precipitation over 11 rainy days.

In contrast, during the driest month (February), you will experience much drier conditions, with 53 mm (2.1 in) of precipitation spread across 8 rainy days. For more details, please visit our Rockwall Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Rockwall can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.1 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 5.8 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Rockwall.

The city experiences its highest humidity in May, reaching 70%. In July, the humidity drops to its lowest level at 60%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year