78681 Round Rock, TX has a humid subtropical climate with hot summers and mild winters. The average temperature in the summer is around 85掳F (29掳C) and in the winter it drops down to an average of around 50掳F (10掳C). Rainfall is abundant throughout the year, with an annual average of 35 inches (89 cm). There are occasional thunderstorms during the summer months, although these usually don't last for very long. The city experiences plenty of sunshine all year round, averaging about 250 sunny days each year.
Round Rock (zip 78681), Texas gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Round Rock (zip 78681) 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 78681). The US average is 205 sunny days.
Round Rock (zip 78681) gets some kind of precipitation, on average, 79 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 36 inches of rain a year
Snow: averages 0 inches of snow a year