Hourly Weather | Today Tuesday, February 24, 2026
Ontario, California
4 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 37%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 40%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 48%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 57%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
59°
Feels Like 59°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 76%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.51 µg/m³
  • PM10: 17.42 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.7 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

5 PM
50 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.41 µg/m³
  • PM10: 16.71 µg/m³
  • O3: 0.054 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 PM
48 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.75 µg/m³
  • PM10: 15.56 µg/m³
  • O3: 0.052 ppm
  • NO2: 1.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 PM
46 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.88 µg/m³
  • PM10: 14.33 µg/m³
  • O3: 0.050 ppm
  • NO2: 1.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

8 PM
44 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 13.66 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.8 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

9 PM
42 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.76 µg/m³
  • PM10: 12.99 µg/m³
  • O3: 0.045 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

10 PM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6 µg/m³
  • PM10: 12.11 µg/m³
  • O3: 0.044 ppm
  • NO2: 2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

11 PM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 10.98 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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