Hourly Weather | Today Thursday, December 11, 2025
Rialto, California
6 AM
Night
54°
Feels Like 52°
0
Humidity: 47%
Wind: 7 mph
UV Index: 0
7 AM
Sunny Weather
52°
Feels Like 48°
0
Humidity: 59%
Wind: 6 mph
UV Index: 0
8 AM
Sunny Weather
55°
Feels Like 55°
0
Humidity: 46%
Wind: 6 mph
UV Index: 1
9 AM
Sunny Weather
61°
Feels Like 64°
0
Humidity: 33%
Wind: 5 mph
UV Index: 2
10 AM
Sunny Weather
66°
Feels Like 70°
0
Humidity: 26%
Wind: 5 mph
UV Index: 2
11 AM
Sunny Weather
72°
Feels Like 75°
0
Humidity: 22%
Wind: 5 mph
UV Index: 3
12 PM
Sunny Weather
75°
Feels Like 79°
0
Humidity: 19%
Wind: 5 mph
UV Index: 3
1 PM
Sunny Weather
79°
Feels Like 81°
0
Humidity: 17%
Wind: 6 mph
UV Index: 3
2 PM
Sunny Weather
81°
Feels Like 82°
0
Humidity: 16%
Wind: 6 mph
UV Index: 2
3 PM
Sunny Weather
79°
Feels Like 79°
0
Humidity: 17%
Wind: 6 mph
UV Index: 2
4 PM
Sunny Weather
75°
Feels Like 75°
0
Humidity: 19%
Wind: 6 mph
UV Index: 1
5 PM
Night
72°
Feels Like 70°
0
Humidity: 22%
Wind: 6 mph
UV Index: 0
6 PM
Night
70°
Feels Like 66°
0
Humidity: 25%
Wind: 6 mph
UV Index: 0
7 PM
Night
66°
Feels Like 64°
0
Humidity: 29%
Wind: 6 mph
UV Index: 0
8 PM
Night
63°
Feels Like 63°
0
Humidity: 32%
Wind: 6 mph
UV Index: 0
9 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 36%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 45%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 46%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
130 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 47.36 µg/m³
  • PM10: 57.14 µg/m³
  • O3: 0.020 ppm
  • NO2: 8.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.43 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

7 AM
127 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 46.01 µg/m³
  • PM10: 55.91 µg/m³
  • O3: 0.020 ppm
  • NO2: 9.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.43 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

8 AM
125 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 45.5 µg/m³
  • PM10: 55.7 µg/m³
  • O3: 0.019 ppm
  • NO2: 10.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.43 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

9 AM
131 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 47.82 µg/m³
  • PM10: 58.47 µg/m³
  • O3: 0.022 ppm
  • NO2: 10.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.45 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

10 AM
148 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 54.65 µg/m³
  • PM10: 65.81 µg/m³
  • O3: 0.027 ppm
  • NO2: 11.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.48 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

11 AM
154 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 62.05 µg/m³
  • PM10: 73.34 µg/m³
  • O3: 0.035 ppm
  • NO2: 11.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.49 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

12 PM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 66.65 µg/m³
  • PM10: 77.48 µg/m³
  • O3: 0.044 ppm
  • NO2: 9.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.48 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

1 PM
157 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 69.58 µg/m³
  • PM10: 79.63 µg/m³
  • O3: 0.052 ppm
  • NO2: 7.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.45 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

2 PM
157 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 69.26 µg/m³
  • PM10: 78.37 µg/m³
  • O3: 0.057 ppm
  • NO2: 5.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.41 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

3 PM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 66.79 µg/m³
  • PM10: 75.11 µg/m³
  • O3: 0.057 ppm
  • NO2: 4.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.37 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

4 PM
154 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 62.64 µg/m³
  • PM10: 70.44 µg/m³
  • O3: 0.055 ppm
  • NO2: 4.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.34 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

5 PM
153 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 62.03 µg/m³
  • PM10: 69.79 µg/m³
  • O3: 0.051 ppm
  • NO2: 5.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.34 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

6 PM
154 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 63.22 µg/m³
  • PM10: 71.17 µg/m³
  • O3: 0.047 ppm
  • NO2: 6.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.36 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

7 PM
155 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 64.3 µg/m³
  • PM10: 72.52 µg/m³
  • O3: 0.044 ppm
  • NO2: 6.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.38 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

8 PM
156 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 66.14 µg/m³
  • PM10: 74.76 µg/m³
  • O3: 0.043 ppm
  • NO2: 7.3 ppb
  • SO2: 0.8 ppb
  • CO: 0.40 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

9 PM
155 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 64.84 µg/m³
  • PM10: 73.76 µg/m³
  • O3: 0.041 ppm
  • NO2: 6.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.39 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

10 PM
153 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 60.77 µg/m³
  • PM10: 69.76 µg/m³
  • O3: 0.040 ppm
  • NO2: 6 ppb
  • SO2: 0.8 ppb
  • CO: 0.37 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

11 PM
149 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 54.98 µg/m³
  • PM10: 63.83 µg/m³
  • O3: 0.038 ppm
  • NO2: 5.4 ppb
  • SO2: 0.8 ppb
  • CO: 0.34 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.