78664 Round Rock, TX has a generally mild climate due to its location in southern central Texas. Summers can be hot and humid with average temperatures in the mid to high 80s Fahrenheit, while winters are usually mild with average temperatures in the low 50s Fahrenheit. Rainfall is spread evenly throughout the year, although thunderstorms can occur during hot summer months. The area enjoys an abundance of sunshine year round.
Round Rock (zip 78664), Texas gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Round Rock (zip 78664) averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 229 sunny days per year in Round Rock (zip 78664). The US average is 205 sunny days.
Round Rock (zip 78664) gets some kind of precipitation, on average, 78 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 95 degrees
Winter Low: the January low is 38
Rain: averages 35 inches of rain a year
Snow: averages 0 inches of snow a year