Hourly Weather | Today Thursday, February 26, 2026
Fontana, California
2 AM
Night
57°
Feels Like 57°
0
Humidity: 76%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
57°
Feels Like 55°
0
Humidity: 78%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 79%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 80%
UV Index: 0
Wind: 6 mph
6 AM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 81%
UV Index: 0
Wind: 6 mph
7 AM
Cloudy Weather
57°
Feels Like 57°
0
Humidity: 78%
UV Index: 1
Wind: 5 mph
8 AM
Cloudy Weather
61°
Feels Like 63°
0
Humidity: 71%
UV Index: 2
Wind: 5 mph
9 AM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 58%
UV Index: 3
Wind: 5 mph
10 AM
Cloudy Weather
73°
Feels Like 75°
0
Humidity: 48%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
77°
Feels Like 81°
0
Humidity: 42%
UV Index: 4
Wind: 6 mph
12 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 37%
UV Index: 5
Wind: 6 mph
1 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 34%
UV Index: 4
Wind: 7 mph
2 PM
Cloudy Weather
82°
Feels Like 86°
0
Humidity: 33%
UV Index: 4
Wind: 7 mph
3 PM
Cloudy Weather
84°
Feels Like 86°
0
Humidity: 32%
UV Index: 3
Wind: 6 mph
4 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 34%
UV Index: 2
Wind: 7 mph
5 PM
Cloudy Weather
81°
Feels Like 79°
0
Humidity: 39%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Night
77°
Feels Like 73°
0
Humidity: 44%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 50%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
72°
Feels Like 68°
0
Humidity: 54%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 56%
UV Index: 0
Wind: 7 mph
10 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 57%
UV Index: 0
Wind: 7 mph
11 PM
Cloudy Night
66°
Feels Like 63°
0
Humidity: 58%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
32 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 7.65 µg/m³
  • PM10: 15.38 µg/m³
  • O3: 0.031 ppm
  • NO2: 3.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

3 AM
35 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 8.42 µg/m³
  • PM10: 15.35 µg/m³
  • O3: 0.029 ppm
  • NO2: 4 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.82 µg/m³
  • PM10: 14.99 µg/m³
  • O3: 0.028 ppm
  • NO2: 3.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.26 µg/m³
  • PM10: 14.78 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

6 AM
41 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 9.9 µg/m³
  • PM10: 15.01 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.62 µg/m³
  • PM10: 15.6 µg/m³
  • O3: 0.023 ppm
  • NO2: 5.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.20 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 12.02 µg/m³
  • PM10: 16.95 µg/m³
  • O3: 0.022 ppm
  • NO2: 6.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.46 µg/m³
  • PM10: 19.47 µg/m³
  • O3: 0.023 ppm
  • NO2: 7.3 ppb
  • SO2: 0.5 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.32 µg/m³
  • PM10: 23.62 µg/m³
  • O3: 0.026 ppm
  • NO2: 8.4 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.

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

Pollutant Concentrations:

  • PM2.5: 21.67 µg/m³
  • PM10: 27.1 µg/m³
  • O3: 0.032 ppm
  • NO2: 8.3 ppb
  • SO2: 0.6 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.

12 PM
74 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.35 µg/m³
  • PM10: 28.6 µg/m³
  • O3: 0.041 ppm
  • NO2: 6.5 ppb
  • SO2: 0.5 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.

1 PM
77 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.55 µg/m³
  • PM10: 29.83 µg/m³
  • O3: 0.050 ppm
  • NO2: 4 ppb
  • SO2: 0.4 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

2 PM
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.88 µg/m³
  • PM10: 29.42 µg/m³
  • O3: 0.056 ppm
  • NO2: 1.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

3 PM
72 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 22.08 µg/m³
  • PM10: 27.91 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

4 PM
67 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.89 µg/m³
  • PM10: 25.88 µg/m³
  • O3: 0.054 ppm
  • NO2: 1.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 18.41 µg/m³
  • PM10: 24.59 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

6 PM
61 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.99 µg/m³
  • PM10: 23.44 µg/m³
  • O3: 0.048 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

7 PM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.76 µg/m³
  • PM10: 22.36 µg/m³
  • O3: 0.045 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.98 µg/m³
  • PM10: 21.66 µg/m³
  • O3: 0.044 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.59 µg/m³
  • PM10: 21.25 µg/m³
  • O3: 0.042 ppm
  • NO2: 1 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.38 µg/m³
  • PM10: 20.98 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.11 µg/m³
  • PM10: 20.68 µg/m³
  • O3: 0.036 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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