Round Rock (TX) Temperature by Month
Round Rock, Texas, United States of America has an average annual maximum temperature of 26°C (79°F), ranging from 16°C (61°F) in January to 36°C (97°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Round Rock Monthly Temperatures
Depending on the time of the year, temperatures range from very hot to mild in Round Rock. At night, minimum temperatures range from 23°C (73°F) in August to 3°C (37°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Round Rock by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 298 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Round Rock vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Round Rock vs World: Temperature Compared
Round Rock's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot summers.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Melbourne, Australia averages 20°C (68°F) annually — known for unpredictable weather, with four seasons sometimes happening in one day.
What Does the Temperature Feel Like in Round Rock?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Round Rock, January is the coolest month, with average highs of 16°C (61°F) and humidity around 67% — considered high. In August, the warmest month, temperatures average 36°C (97°F) with 64% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Round Rock this rarely lasts long on the ground.
For more on Round Rock's weather — including monthly rainfall, sunshine hours, and humidity — visit our Round Rock climate page.
