Hourly Weather | Today Friday, June 26, 2026
Ontario, California
1 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 81%
UV Index: 0
Wind: 7 mph
2 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 82%
UV Index: 0
Wind: 6 mph
3 AM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 83%
UV Index: 0
Wind: 6 mph
4 AM
Cloudy Night
59°
Feels Like 57°
0
Humidity: 84%
UV Index: 0
Wind: 6 mph
5 AM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 88%
UV Index: 0
Wind: 5 mph
6 AM
Cloudy Weather
61°
Feels Like 59°
0
Humidity: 83%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Weather
61°
Feels Like 61°
0
Humidity: 82%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 77%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
64°
Feels Like 66°
0
Humidity: 70%
UV Index: 1
Wind: 5 mph
10 AM
Cloudy Weather
68°
Feels Like 70°
0
Humidity: 64%
UV Index: 2
Wind: 6 mph
11 AM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 58%
UV Index: 3
Wind: 7 mph
12 PM
Cloudy Weather
73°
Feels Like 75°
0
Humidity: 53%
UV Index: 4
Wind: 8 mph
1 PM
Cloudy Weather
75°
Feels Like 79°
0
Humidity: 50%
UV Index: 5
Wind: 10 mph
2 PM
Cloudy Weather
79°
Feels Like 84°
0
Humidity: 47%
UV Index: 11
Wind: 12 mph
3 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 46%
UV Index: 8
Wind: 13 mph
4 PM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 50%
UV Index: 5
Wind: 14 mph
5 PM
Cloudy Weather
77°
Feels Like 77°
0
Humidity: 53%
UV Index: 4
Wind: 14 mph
6 PM
Cloudy Weather
75°
Feels Like 73°
0
Humidity: 56%
UV Index: 2
Wind: 13 mph
7 PM
Cloudy Weather
73°
Feels Like 70°
0
Humidity: 61%
UV Index: 1
Wind: 13 mph
8 PM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 66%
UV Index: 0
Wind: 13 mph
9 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 70%
UV Index: 0
Wind: 13 mph
10 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 75%
UV Index: 0
Wind: 12 mph
11 PM
Cloudy Night
64°
Feels Like 61°
0
Humidity: 75%
UV Index: 0
Wind: 10 mph

Hourly Air Quality Forecast - AQI (US EPA)

1 AM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.94 µg/m³
  • PM10: 6.93 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

2 AM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 7.18 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

3 AM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.18 µg/m³
  • PM10: 7.5 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

4 AM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.33 µg/m³
  • PM10: 7.92 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

5 AM
41 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.49 µg/m³
  • PM10: 8.37 µg/m³
  • O3: 0.044 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

6 AM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.67 µg/m³
  • PM10: 8.84 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

7 AM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.85 µg/m³
  • PM10: 9.29 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

8 AM
40 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.02 µg/m³
  • PM10: 9.72 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

9 AM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.21 µg/m³
  • PM10: 10.14 µg/m³
  • O3: 0.043 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

10 AM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.42 µg/m³
  • PM10: 10.62 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.61 µg/m³
  • PM10: 11.04 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.81 µg/m³
  • PM10: 11.51 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

1 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.04 µg/m³
  • PM10: 12.11 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

2 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.3 µg/m³
  • PM10: 12.83 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

3 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.59 µg/m³
  • PM10: 13.75 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.82 µg/m³
  • PM10: 14.65 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.84 µg/m³
  • PM10: 15.19 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.51 µg/m³
  • PM10: 14.71 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.06 µg/m³
  • PM10: 14.12 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.61 µg/m³
  • PM10: 13.56 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.22 µg/m³
  • PM10: 13.17 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.95 µg/m³
  • PM10: 13 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.81 µg/m³
  • PM10: 13.18 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.07 ppm

Health Recommendations:

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