Hourly Weather | Today Monday, January 19, 2026
Rialto, California
1 AM
Cloudy Night
54°
Feels Like 52°
0
Humidity: 44%
Wind: 7 mph
UV Index: 0
2 AM
Cloudy Night
52°
Feels Like 50°
0
Humidity: 44%
Wind: 7 mph
UV Index: 0
3 AM
Cloudy Night
52°
Feels Like 48°
0
Humidity: 44%
Wind: 7 mph
UV Index: 0
4 AM
Night
50°
Feels Like 46°
0
Humidity: 44%
Wind: 7 mph
UV Index: 0
5 AM
Night
48°
Feels Like 45°
0
Humidity: 45%
Wind: 7 mph
UV Index: 0
6 AM
Cloudy Night
48°
Feels Like 45°
0
Humidity: 45%
Wind: 7 mph
UV Index: 0
7 AM
Cloudy Weather
50°
Feels Like 46°
0
Humidity: 47%
Wind: 7 mph
UV Index: 0
8 AM
Cloudy Weather
54°
Feels Like 54°
0
Humidity: 39%
Wind: 7 mph
UV Index: 1
9 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 33%
Wind: 6 mph
UV Index: 2
10 AM
Cloudy Weather
66°
Feels Like 68°
0
Humidity: 27%
Wind: 6 mph
UV Index: 2
11 AM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 21%
Wind: 6 mph
UV Index: 3
12 PM
Cloudy Weather
75°
Feels Like 77°
0
Humidity: 17%
Wind: 7 mph
UV Index: 3
1 PM
Cloudy Weather
77°
Feels Like 79°
0
Humidity: 16%
Wind: 7 mph
UV Index: 3
2 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 15%
Wind: 8 mph
UV Index: 2
3 PM
Cloudy Weather
79°
Feels Like 77°
0
Humidity: 15%
Wind: 8 mph
UV Index: 2
4 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 17%
Wind: 9 mph
UV Index: 1
5 PM
Cloudy Weather
73°
Feels Like 70°
0
Humidity: 18%
Wind: 9 mph
UV Index: 0
6 PM
Night
70°
Feels Like 66°
0
Humidity: 20%
Wind: 9 mph
UV Index: 0
7 PM
Night
66°
Feels Like 64°
0
Humidity: 22%
Wind: 9 mph
UV Index: 0
8 PM
Night
64°
Feels Like 63°
0
Humidity: 23%
Wind: 9 mph
UV Index: 0
9 PM
Night
63°
Feels Like 61°
0
Humidity: 24%
Wind: 10 mph
UV Index: 0
10 PM
Night
63°
Feels Like 57°
0
Humidity: 27%
Wind: 10 mph
UV Index: 0
11 PM
Night
61°
Feels Like 57°
0
Humidity: 27%
Wind: 10 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
96 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 33.54 µg/m³
  • PM10: 44.08 µg/m³
  • O3: 0.034 ppm
  • NO2: 5.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

2 AM
94 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 32.49 µg/m³
  • PM10: 42.89 µg/m³
  • O3: 0.034 ppm
  • NO2: 5 ppb
  • SO2: 0.6 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

3 AM
93 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 31.93 µg/m³
  • PM10: 42.36 µg/m³
  • O3: 0.034 ppm
  • NO2: 4.5 ppb
  • SO2: 0.6 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

4 AM
92 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 31.88 µg/m³
  • PM10: 42.36 µg/m³
  • O3: 0.034 ppm
  • NO2: 4.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.27 ppm

Health Recommendations:

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

5 AM
93 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 31.95 µg/m³
  • PM10: 42.57 µg/m³
  • O3: 0.034 ppm
  • NO2: 4 ppb
  • SO2: 0.6 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

6 AM
93 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 32.21 µg/m³
  • PM10: 42.96 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.8 ppb
  • SO2: 0.6 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

7 AM
94 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 32.65 µg/m³
  • PM10: 43.52 µg/m³
  • O3: 0.035 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

8 AM
96 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 33.45 µg/m³
  • PM10: 44.42 µg/m³
  • O3: 0.036 ppm
  • NO2: 3.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

9 AM
98 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 34.58 µg/m³
  • PM10: 45.55 µg/m³
  • O3: 0.037 ppm
  • NO2: 3.6 ppb
  • SO2: 0.7 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 36.45 µg/m³
  • PM10: 47.3 µg/m³
  • O3: 0.041 ppm
  • NO2: 3.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

11 AM
109 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 38.98 µg/m³
  • PM10: 49.57 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

12 PM
116 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 41.99 µg/m³
  • PM10: 52.32 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

1 PM
124 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 44.83 µg/m³
  • PM10: 54.81 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.2 ppb
  • SO2: 0.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

2 PM
126 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 45.89 µg/m³
  • PM10: 55.31 µg/m³
  • O3: 0.061 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

3 PM
124 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 44.94 µg/m³
  • PM10: 53.8 µg/m³
  • O3: 0.062 ppm
  • NO2: 0.9 ppb
  • SO2: 0.6 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

4 PM
119 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 43.11 µg/m³
  • PM10: 51.53 µg/m³
  • O3: 0.062 ppm
  • NO2: 1 ppb
  • SO2: 0.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 41.82 µg/m³
  • PM10: 49.87 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

6 PM
116 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 41.9 µg/m³
  • PM10: 49.78 µg/m³
  • O3: 0.060 ppm
  • NO2: 1.7 ppb
  • SO2: 0.7 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

7 PM
120 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 43.21 µg/m³
  • PM10: 51.14 µg/m³
  • O3: 0.060 ppm
  • NO2: 2.1 ppb
  • SO2: 0.9 ppb
  • CO: 0.26 ppm

Health Recommendations:

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

8 PM
126 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 45.96 µg/m³
  • PM10: 54.22 µg/m³
  • O3: 0.059 ppm
  • NO2: 2.7 ppb
  • SO2: 1.1 ppb
  • CO: 0.28 ppm

Health Recommendations:

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

9 PM
133 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 48.55 µg/m³
  • PM10: 57.08 µg/m³
  • O3: 0.058 ppm
  • NO2: 3 ppb
  • SO2: 1.1 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

10 PM
135 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 49.56 µg/m³
  • PM10: 58.19 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.1 ppb
  • SO2: 1.1 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 49.4 µg/m³
  • PM10: 58.08 µg/m³
  • O3: 0.055 ppm
  • NO2: 3 ppb
  • SO2: 1 ppb
  • CO: 0.31 ppm

Health Recommendations:

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