Today | Weather | Tuesday, August 25, 2026
Active Weather Warnings

Weather in Round Rock, Texas

06:18 AM
Now
Cloudy Night
77° F
Feels Like 79°
Precipitation 0 %
Wind 7 mph
Humidity 77 %
Today
Cloudy Weather
Day 104°
Night 77°
Precipitation 1 %
Wind 8 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Round Rock Weather Forecast Updated

20 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 25, 2025)
Night

Day

97°

Night

73°

Wind

6 mph

Precipitation

2 %

Air Quality in Round Rock

NOW
11 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.02 µg/m³
PM10 5.04 µg/m³
O3 0.012 ppm
NO2 1.8 ppb
SO2 0.6 ppb
CO 0.08 ppm
NH3 0.52 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.52.02 µg/m³
PM105.04 µg/m³
O323.51 µg/m³
NO23.3 µg/m³
SO21.51 µg/m³
CO96.7 µg/m³
NH30.52 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Round Rock

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 24 at 6:53PM CDT until August 26 at 7:00PM CDT by NWS Austin/San Antonio TX
Aug 24, 7:00 PM Aug 26, 7:00 PM
WHAT: Temperatures up to 105 and heat index values up to 110
expected Tuesday and Wednesday.

WHERE: Bastrop, Burnet, Llano, Travis, and Williamson Counties.

WHEN: Until 7 PM CDT Wednesday.

IMPACTS: Hot temperatures may cause heat illnesses.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Updated: Aug 25, 5:57 AM Source: NWS Alert