Hourly Weather | Today Tuesday, January 13, 2026
Fontana, California
3 PM
Sunny Weather
77°
Feels Like 75°
0
Humidity: 17%
Wind: 16 mph
UV Index: 2
4 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 20%
Wind: 17 mph
UV Index: 1
5 PM
Sunny Weather
72°
Feels Like 66°
0
Humidity: 21%
Wind: 17 mph
UV Index: 0
6 PM
Night
70°
Feels Like 64°
0
Humidity: 23%
Wind: 16 mph
UV Index: 0
7 PM
Night
64°
Feels Like 61°
0
Humidity: 26%
Wind: 16 mph
UV Index: 0
8 PM
Night
63°
Feels Like 57°
0
Humidity: 27%
Wind: 16 mph
UV Index: 0
9 PM
Night
63°
Feels Like 57°
0
Humidity: 29%
Wind: 15 mph
UV Index: 0
10 PM
Night
61°
Feels Like 55°
0
Humidity: 30%
Wind: 15 mph
UV Index: 0
11 PM
Night
59°
Feels Like 54°
0
Humidity: 32%
Wind: 15 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 53.02 µg/m³
  • PM10: 70.06 µg/m³
  • O3: 0.048 ppm
  • NO2: 27 ppb
  • SO2: 2.6 ppb
  • CO: 0.49 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 54.11 µg/m³
  • PM10: 71.14 µg/m³
  • O3: 0.048 ppm
  • NO2: 28.8 ppb
  • SO2: 2.5 ppb
  • CO: 0.49 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 51.04 µg/m³
  • PM10: 67.99 µg/m³
  • O3: 0.046 ppm
  • NO2: 30.1 ppb
  • SO2: 2.5 ppb
  • CO: 0.47 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 46.03 µg/m³
  • PM10: 62.45 µg/m³
  • O3: 0.044 ppm
  • NO2: 24.5 ppb
  • SO2: 2.3 ppb
  • CO: 0.45 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 40.32 µg/m³
  • PM10: 55.64 µg/m³
  • O3: 0.043 ppm
  • NO2: 17.5 ppb
  • SO2: 2 ppb
  • CO: 0.41 ppm

Health Recommendations:

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

8 PM
98 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 34.46 µg/m³
  • PM10: 48.29 µg/m³
  • O3: 0.042 ppm
  • NO2: 12.6 ppb
  • SO2: 1.6 ppb
  • CO: 0.38 ppm

Health Recommendations:

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

9 PM
87 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 29.53 µg/m³
  • PM10: 41.64 µg/m³
  • O3: 0.041 ppm
  • NO2: 9.5 ppb
  • SO2: 1.3 ppb
  • CO: 0.34 ppm

Health Recommendations:

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

10 PM
78 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.02 µg/m³
  • PM10: 35.39 µg/m³
  • O3: 0.038 ppm
  • NO2: 7.8 ppb
  • SO2: 1.1 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

11 PM
70 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 21.4 µg/m³
  • PM10: 30.29 µg/m³
  • O3: 0.036 ppm
  • NO2: 6.6 ppb
  • SO2: 0.9 ppb
  • CO: 0.29 ppm

Health Recommendations:

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