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Hourly Forecast
Daylight Hours
07:20
Sunrise
19:29
Sunset
Moon
Waxing Crescent
12:42
Moonrise
22:07
Moonset
Daily Forecast
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Air Quality Data Available
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UV Index
Humidity
Weather in Round Rock today, September 16, 2026
Conditions in Round Rock on September 16, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. Cloud leads the morning, peaking close to 67% near 09:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 25°C toward a daytime high of about 37°C. Relative humidity sits between 30% and 87%, reaching its peak around 07:00. Winds stay light, near 5.4 km/h by 00:00, so the day feels still more than breezy.
Through the afternoon cloud remains the main feature, with cover near 90% around 15:00. Bright spells should stay limited even as the day wears on. Horizontal visibility sits around 16.0 km, briefly nearer 15.0 km. Daylight runs from 07:20 to 19:29, lasting 12 hours 8 minutes of sunlight today.
Taken together, settled sunshine in Round Rock on September 16, 2026 makes outdoor timing easier, with highs near 37°C.
Frequently asked questions about weather in Round Rock
How warm does it get in Round Rock?
The warmest month in Round Rock is August, with average high temperatures of 36°C. The average temperature during this period is around 30°C.
How cold does it get in Round Rock?
The coldest month in Round Rock is January, with average low temperatures of 5°C. The average temperature during this period is around 10°C.
What is the wettest time of year in Round Rock?
The wettest month in Round Rock is May, with an average of 144mm of precipitation.
What is the driest time of year in Round Rock?
The driest month in Round Rock is January, with an average of 53mm of precipitation.
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