Hourly Weather | Today Monday, January 19, 2026
Round Rock, Texas
3 AM
Night
36°
Feels Like 30°
0
Humidity: 47%
Wind: 6 mph
UV Index: 0
4 AM
Night
36°
Feels Like 32°
0
Humidity: 51%
Wind: 6 mph
UV Index: 0
5 AM
Night
36°
Feels Like 34°
0
Humidity: 53%
Wind: 6 mph
UV Index: 0
6 AM
Night
36°
Feels Like 34°
0
Humidity: 52%
Wind: 5 mph
UV Index: 0
7 AM
Night
36°
Feels Like 34°
0
Humidity: 46%
Wind: 6 mph
UV Index: 0
8 AM
Cloudy Weather
37°
Feels Like 39°
0
Humidity: 43%
Wind: 5 mph
UV Index: 1
9 AM
Sunny Weather
43°
Feels Like 46°
0
Humidity: 37%
Wind: 5 mph
UV Index: 2
10 AM
Sunny Weather
48°
Feels Like 52°
0
Humidity: 31%
Wind: 6 mph
UV Index: 3
11 AM
Sunny Weather
55°
Feels Like 61°
0
Humidity: 24%
Wind: 6 mph
UV Index: 3
12 PM
Sunny Weather
61°
Feels Like 66°
0
Humidity: 20%
Wind: 7 mph
UV Index: 4
1 PM
Cloudy Weather
64°
Feels Like 68°
0
Humidity: 17%
Wind: 7 mph
UV Index: 3
2 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 16%
Wind: 7 mph
UV Index: 3
3 PM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 15%
Wind: 8 mph
UV Index: 2
4 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 17%
Wind: 7 mph
UV Index: 1
5 PM
Cloudy Weather
64°
Feels Like 63°
0
Humidity: 20%
Wind: 7 mph
UV Index: 0
6 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 25%
Wind: 6 mph
UV Index: 0
7 PM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 30%
Wind: 6 mph
UV Index: 0
8 PM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 35%
Wind: 7 mph
UV Index: 0
9 PM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 40%
Wind: 7 mph
UV Index: 0
10 PM
Cloudy Night
48°
Feels Like 45°
0
Humidity: 46%
Wind: 7 mph
UV Index: 0
11 PM
Cloudy Night
46°
Feels Like 43°
0
Humidity: 51%
Wind: 7 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

3 AM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.14 µg/m³
  • PM10: 7 µg/m³
  • O3: 0.032 ppm
  • NO2: 3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

4 AM
28 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.37 µg/m³
  • PM10: 7.35 µg/m³
  • O3: 0.030 ppm
  • NO2: 3.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 AM
25 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.71 µg/m³
  • PM10: 7.88 µg/m³
  • O3: 0.027 ppm
  • NO2: 3.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

6 AM
23 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.23 µg/m³
  • PM10: 8.71 µg/m³
  • O3: 0.024 ppm
  • NO2: 5.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

7 AM
27 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.52 µg/m³
  • PM10: 10.59 µg/m³
  • O3: 0.019 ppm
  • NO2: 9.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.21 µg/m³
  • PM10: 12.99 µg/m³
  • O3: 0.013 ppm
  • NO2: 15.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.46 µg/m³
  • PM10: 14.78 µg/m³
  • O3: 0.013 ppm
  • NO2: 15.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.52 µg/m³
  • PM10: 14.92 µg/m³
  • O3: 0.019 ppm
  • NO2: 12.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

11 AM
37 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.89 µg/m³
  • PM10: 14.03 µg/m³
  • O3: 0.023 ppm
  • NO2: 10 ppb
  • SO2: 0.5 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

12 PM
33 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.93 µg/m³
  • PM10: 12.68 µg/m³
  • O3: 0.029 ppm
  • NO2: 8.2 ppb
  • SO2: 0.7 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

1 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.94 µg/m³
  • PM10: 7.98 µg/m³
  • O3: 0.055 ppm
  • NO2: 3 ppb
  • SO2: 2.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
68 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.55 µg/m³
  • PM10: 6.88 µg/m³
  • O3: 0.060 ppm
  • NO2: 1.9 ppb
  • SO2: 2 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
73 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 6.78 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.5 ppb
  • SO2: 1.6 ppb
  • CO: 0.12 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
76 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.89 µg/m³
  • PM10: 7.01 µg/m³
  • O3: 0.062 ppm
  • NO2: 1.7 ppb
  • SO2: 1.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
70 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.02 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.060 ppm
  • NO2: 2.6 ppb
  • SO2: 1.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
60 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.94 µg/m³
  • PM10: 7.23 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.5 ppb
  • SO2: 0.8 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 4.71 µg/m³
  • PM10: 7.06 µg/m³
  • O3: 0.054 ppm
  • NO2: 3.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.42 µg/m³
  • PM10: 6.79 µg/m³
  • O3: 0.052 ppm
  • NO2: 3.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.09 µg/m³
  • PM10: 6.43 µg/m³
  • O3: 0.050 ppm
  • NO2: 3 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.85 µg/m³
  • PM10: 6.12 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.87 µg/m³
  • PM10: 6.1 µg/m³
  • O3: 0.047 ppm
  • NO2: 3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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