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Hourly Weather | Today | Wednesday, August 13, 2025
Rialto, California
1 AM
NightNighttime, with dark skies and stars or a moon visible.
70°
Feels Like 70°
0
Humidity: 74%
Wind: 4 mph
UV Index: 0
2 AM
NightNighttime, with dark skies and stars or a moon visible.
70°
Feels Like 68°
0
Humidity: 76%
Wind: 4 mph
UV Index: 0
3 AM
NightNighttime, with dark skies and stars or a moon visible.
68°
Feels Like 66°
0
Humidity: 78%
Wind: 4 mph
UV Index: 0
4 AM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 66°
0
Humidity: 80%
Wind: 2 mph
UV Index: 0
5 AM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 66°
0
Humidity: 83%
Wind: 2 mph
UV Index: 0
6 AM
NightNighttime, with dark skies and stars or a moon visible.
66°
Feels Like 64°
0
Humidity: 84%
Wind: 2 mph
UV Index: 0
7 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
68°
Feels Like 70°
0
Humidity: 77%
Wind: 2 mph
UV Index: 1
8 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
73°
Feels Like 75°
0
Humidity: 67%
Wind: 2 mph
UV Index: 2
9 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
77°
Feels Like 81°
0
Humidity: 58%
Wind: 4 mph
UV Index: 3
10 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
81°
Feels Like 88°
0
Humidity: 50%
Wind: 5 mph
UV Index: 4
11 AM
Sunny WeatherSunny weather, clear skies and sunny weather.
84°
Feels Like 91°
0
Humidity: 43%
Wind: 6 mph
UV Index: 7
12 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
88°
Feels Like 95°
0
Humidity: 38%
Wind: 7 mph
UV Index: 9
1 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
91°
Feels Like 97°
0
Humidity: 32%
Wind: 8 mph
UV Index: 10
2 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
93°
Feels Like 99°
0
Humidity: 29%
Wind: 9 mph
UV Index: 9
3 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
95°
Feels Like 99°
0
Humidity: 27%
Wind: 10 mph
UV Index: 7
4 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
93°
Feels Like 95°
0
Humidity: 28%
Wind: 12 mph
UV Index: 4
5 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
93°
Feels Like 91°
0
Humidity: 30%
Wind: 12 mph
UV Index: 3
6 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
91°
Feels Like 90°
0
Humidity: 33%
Wind: 10 mph
UV Index: 2
7 PM
Sunny WeatherSunny weather, clear skies and sunny weather.
88°
Feels Like 86°
0
Humidity: 36%
Wind: 9 mph
UV Index: 1
8 PM
NightNighttime, with dark skies and stars or a moon visible.
84°
Feels Like 82°
0
Humidity: 42%
Wind: 7 mph
UV Index: 0
9 PM
NightNighttime, with dark skies and stars or a moon visible.
82°
Feels Like 81°
0
Humidity: 47%
Wind: 6 mph
UV Index: 0
10 PM
NightNighttime, with dark skies and stars or a moon visible.
81°
Feels Like 79°
0
Humidity: 52%
Wind: 5 mph
UV Index: 0
11 PM
NightNighttime, with dark skies and stars or a moon visible.
77°
Feels Like 75°
0
Humidity: 57%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
64 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 27.09 µg/m³
  • PM10: 46.08 µg/m³
  • O₃: 38.50 ppb
  • NO₂: 18.97 ppb
  • SO₂: 2.79 ppb
  • CO: 249.04 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 AM
66 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 28.59 µg/m³
  • PM10: 42.95 µg/m³
  • O₃: 33.89 ppb
  • NO₂: 19.04 ppb
  • SO₂: 2.93 ppb
  • CO: 271.34 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 AM
67 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 29.04 µg/m³
  • PM10: 40.66 µg/m³
  • O₃: 33.11 ppb
  • NO₂: 17.92 ppb
  • SO₂: 3.01 ppb
  • CO: 272.84 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 AM
69 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 28.78 µg/m³
  • PM10: 38.71 µg/m³
  • O₃: 32.33 ppb
  • NO₂: 16.91 ppb
  • SO₂: 3.02 ppb
  • CO: 271.73 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 AM
70 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 29.98 µg/m³
  • PM10: 31.19 µg/m³
  • O₃: 30.72 ppb
  • NO₂: 14.24 ppb
  • SO₂: 3.42 ppb
  • CO: 285.14 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 AM
72 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 28.85 µg/m³
  • PM10: 30.32 µg/m³
  • O₃: 34.91 ppb
  • NO₂: 13.42 ppb
  • SO₂: 3.36 ppb
  • CO: 286.20 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 AM
73 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 27.91 µg/m³
  • PM10: 29.75 µg/m³
  • O₃: 39.11 ppb
  • NO₂: 12.60 ppb
  • SO₂: 3.31 ppb
  • CO: 287.25 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 AM
74 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 27.34 µg/m³
  • PM10: 29.11 µg/m³
  • O₃: 43.31 ppb
  • NO₂: 11.77 ppb
  • SO₂: 3.25 ppb
  • CO: 288.31 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 AM
75 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 24.02 µg/m³
  • PM10: 26.72 µg/m³
  • O₃: 57.62 ppb
  • NO₂: 9.68 ppb
  • SO₂: 3.23 ppb
  • CO: 259.83 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
76 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 23.65 µg/m³
  • PM10: 26.26 µg/m³
  • O₃: 71.92 ppb
  • NO₂: 7.58 ppb
  • SO₂: 3.21 ppb
  • CO: 231.36 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
76 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 23.86 µg/m³
  • PM10: 26.37 µg/m³
  • O₃: 86.23 ppb
  • NO₂: 5.48 ppb
  • SO₂: 3.19 ppb
  • CO: 202.88 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
76 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 24.25 µg/m³
  • PM10: 26.67 µg/m³
  • O₃: 93.80 ppb
  • NO₂: 4.61 ppb
  • SO₂: 3.02 ppb
  • CO: 198.47 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
87 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 24.99 µg/m³
  • PM10: 27.39 µg/m³
  • O₃: 101.37 ppb
  • NO₂: 3.73 ppb
  • SO₂: 2.85 ppb
  • CO: 194.07 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
116 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 25.64 µg/m³
  • PM10: 27.95 µg/m³
  • O₃: 108.94 ppb
  • NO₂: 2.86 ppb
  • SO₂: 2.68 ppb
  • CO: 189.66 ppb

Health Recommendations:

Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.

3 PM
147 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 26.57 µg/m³
  • PM10: 28.78 µg/m³
  • O₃: 110.47 ppb
  • NO₂: 3.13 ppb
  • SO₂: 2.94 ppb
  • CO: 189.02 ppb

Health Recommendations:

Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.

4 PM
168 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 27.31 µg/m³
  • PM10: 29.48 µg/m³
  • O₃: 111.99 ppb
  • NO₂: 3.41 ppb
  • SO₂: 3.20 ppb
  • CO: 188.38 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.

5 PM
186 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 28.50 µg/m³
  • PM10: 30.64 µg/m³
  • O₃: 113.52 ppb
  • NO₂: 3.68 ppb
  • SO₂: 3.45 ppb
  • CO: 187.73 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.

6 PM
197 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 30.06 µg/m³
  • PM10: 32.30 µg/m³
  • O₃: 105.59 ppb
  • NO₂: 5.67 ppb
  • SO₂: 3.95 ppb
  • CO: 199.91 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.

7 PM
200 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 31.61 µg/m³
  • PM10: 33.91 µg/m³
  • O₃: 97.66 ppb
  • NO₂: 7.65 ppb
  • SO₂: 4.45 ppb
  • CO: 212.08 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.

8 PM
199 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 32.08 µg/m³
  • PM10: 34.57 µg/m³
  • O₃: 89.73 ppb
  • NO₂: 9.63 ppb
  • SO₂: 4.94 ppb
  • CO: 224.26 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.

9 PM
192 AQI
Unhealthy air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 31.83 µg/m³
  • PM10: 34.42 µg/m³
  • O₃: 77.86 ppb
  • NO₂: 10.97 ppb
  • SO₂: 4.83 ppb
  • CO: 239.52 ppb

Health Recommendations:

Air quality may be unhealthy for everyone. All individuals may begin to experience adverse health effects.