Hourly Weather | Today › Sunday, October 25, 2026
Ontario, California
6 AM
Night
55°
Feels Like 54°
0
Humidity: 77%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 78%
UV Index: 0
Wind: 5 mph
8 AM
Cloudy Weather
59°
Feels Like 59°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph
9 AM
Cloudy Weather
63°
Feels Like 66°
0
Humidity: 59%
UV Index: 1
Wind: 5 mph
10 AM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 52%
UV Index: 2
Wind: 4 mph
11 AM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 46%
UV Index: 3
Wind: 5 mph
12 PM
Sunny Weather
75°
Feels Like 79°
0
Humidity: 39%
UV Index: 4
Wind: 6 mph
1 PM
Sunny Weather
77°
Feels Like 81°
0
Humidity: 35%
UV Index: 4
Wind: 7 mph
2 PM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 33%
UV Index: 4
Wind: 7 mph
3 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 31%
UV Index: 3
Wind: 7 mph
4 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 33%
UV Index: 2
Wind: 8 mph
5 PM
Cloudy Weather
77°
Feels Like 77°
0
Humidity: 35%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 41%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Night
72°
Feels Like 68°
0
Humidity: 49%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
68°
Feels Like 66°
0
Humidity: 56%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
66°
Feels Like 63°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 66%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 8.01 µg/m³
  • PM10: 14.15 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 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 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.44 µg/m³
  • PM10: 14.68 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 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 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.05 µg/m³
  • PM10: 15.33 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 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 AM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.01 µg/m³
  • PM10: 16.44 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.69 µg/m³
  • PM10: 17.34 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.78 µg/m³
  • PM10: 17.8 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.4 µg/m³
  • PM10: 18.1 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.05 µg/m³
  • PM10: 18.26 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.98 µg/m³
  • PM10: 18.29 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

3 PM
55 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.52 µg/m³
  • PM10: 18.3 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

4 PM
68 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.51 µg/m³
  • PM10: 18.83 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

5 PM
77 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.43 µg/m³
  • PM10: 19.5 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

6 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.23 µg/m³
  • PM10: 20.29 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 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.

7 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.81 µg/m³
  • PM10: 20.96 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 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
77 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13.74 µg/m³
  • PM10: 21.05 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 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.

9 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 13 µg/m³
  • PM10: 20.36 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.8 ppb
  • SO2: 0.5 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
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 12.14 µg/m³
  • PM10: 19.43 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 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
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 11.3 µg/m³
  • PM10: 18.43 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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