Hourly Weather | Today Tuesday, August 25, 2026
Active Weather Warnings
Round Rock, Texas
8 AM
Cloudy Weather
79°
Feels Like 84°
0
Humidity: 73%
UV Index: 2
Wind: 7 mph
9 AM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 68%
UV Index: 3
Wind: 8 mph
10 AM
Cloudy Weather
88°
Feels Like 93°
0
Humidity: 57%
UV Index: 4
Wind: 8 mph
11 AM
Cloudy Weather
91°
Feels Like 99°
0
Humidity: 47%
UV Index: 6
Wind: 8 mph
12 PM
Cloudy Weather
95°
Feels Like 102°
0
Humidity: 40%
UV Index: 9
Wind: 7 mph
1 PM
Cloudy Weather
99°
Feels Like 106°
0
Humidity: 33%
UV Index: 10
Wind: 7 mph
2 PM
Cloudy Weather
100°
Feels Like 108°
0
Humidity: 29%
UV Index: 9
Wind: 7 mph
3 PM
Cloudy Weather
102°
Feels Like 106°
0
Humidity: 26%
UV Index: 6
Wind: 7 mph
4 PM
Sunny Weather
102°
Feels Like 106°
0
Humidity: 24%
UV Index: 4
Wind: 8 mph
5 PM
Sunny Weather
104°
Feels Like 104°
0
Humidity: 23%
UV Index: 3
Wind: 8 mph
6 PM
Sunny Weather
102°
Feels Like 102°
0
Humidity: 24%
UV Index: 2
Wind: 8 mph
7 PM
Sunny Weather
100°
Feels Like 99°
0
Humidity: 25%
UV Index: 0
Wind: 8 mph
8 PM
Cloudy Weather
99°
Feels Like 95°
0
Humidity: 29%
UV Index: 0
Wind: 8 mph
9 PM
Cloudy Night
95°
Feels Like 93°
0
Humidity: 34%
UV Index: 0
Wind: 9 mph
10 PM
Cloudy Night
91°
Feels Like 91°
0
Humidity: 39%
UV Index: 0
Wind: 9 mph
11 PM
Cloudy Night
90°
Feels Like 90°
0
Humidity: 46%
UV Index: 0
Wind: 9 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
10 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.31 µg/m³
  • PM10: 5.62 µg/m³
  • O3: 0.010 ppm
  • NO2: 3.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

9 AM
10 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.46 µg/m³
  • PM10: 5.9 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.9 ppb
  • SO2: 0.9 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

10 AM
13 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.63 µg/m³
  • PM10: 6.13 µg/m³
  • O3: 0.014 ppm
  • NO2: 2.2 ppb
  • SO2: 1.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

11 AM
21 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.73 µg/m³
  • PM10: 5.71 µg/m³
  • O3: 0.022 ppm
  • NO2: 1.5 ppb
  • SO2: 1.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

12 PM
29 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.42 µg/m³
  • PM10: 6 µg/m³
  • O3: 0.032 ppm
  • NO2: 1 ppb
  • SO2: 1.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

1 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 6.84 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.8 ppb
  • SO2: 1.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

2 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.03 µg/m³
  • PM10: 6.05 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.7 ppb
  • SO2: 1 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

3 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.26 µg/m³
  • PM10: 4.78 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

4 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.94 µg/m³
  • PM10: 4.33 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.6 ppb
  • SO2: 0.8 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

5 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.7 µg/m³
  • PM10: 4.04 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

6 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.32 µg/m³
  • PM10: 3.59 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

7 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.92 µg/m³
  • PM10: 3.16 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

8 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 2.99 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

9 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.56 µg/m³
  • PM10: 3.2 µg/m³
  • O3: 0.033 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

10 PM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.56 µg/m³
  • PM10: 3.64 µg/m³
  • O3: 0.030 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.08 ppm

Health Recommendations:

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

11 PM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.52 µg/m³
  • PM10: 3.96 µg/m³
  • O3: 0.025 ppm
  • NO2: 1.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

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.
+ Read More
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