Hourly Weather | Today Monday, January 19, 2026
Ontario, California
8 PM
Night
63°
Feels Like 63°
0
Humidity: 37%
Wind: 7 mph
UV Index: 0
9 PM
Night
61°
Feels Like 59°
0
Humidity: 39%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
59°
Feels Like 57°
0
Humidity: 41%
Wind: 7 mph
UV Index: 0
11 PM
Night
57°
Feels Like 55°
0
Humidity: 40%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 46.45 µg/m³
  • PM10: 54.75 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.5 ppb
  • SO2: 1.2 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 47.84 µg/m³
  • PM10: 56.23 µg/m³
  • O3: 0.055 ppm
  • NO2: 3.4 ppb
  • SO2: 1.2 ppb
  • CO: 0.33 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 47.83 µg/m³
  • PM10: 56.13 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.9 ppb
  • SO2: 1.2 ppb
  • CO: 0.33 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 47.31 µg/m³
  • PM10: 55.46 µg/m³
  • O3: 0.052 ppm
  • NO2: 2.3 ppb
  • SO2: 1.1 ppb
  • CO: 0.32 ppm

Health Recommendations:

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