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

Visitors to Richardson can expect significant temperature changes throughout the year. 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 25°C (77°F) in August to 2°C (36°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Richardson is known for its substantial rain/snowfall, with annual precipitation reaching 1037 mm (41 in). Richardson can be quite wet during May, receiving approximately 144 mm (5.7 in) of precipitation over 11 rainy days.

In contrast, during the driest month (July), you will experience much drier conditions, with 53 mm (2.1 in) of precipitation spread across 7 rainy days. For more details, please visit our Richardson Precipitation page.

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

The average number of days each month with precipitation

Richardson 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 Richardson.

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