Hourly Weather | Today › Sunday, October 25, 2026
Rialto, California
4 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 29%
UV Index: 2
Wind: 7 mph
5 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 34%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 39%
UV Index: 0
Wind: 7 mph
7 PM
Cloudy Night
72°
Feels Like 68°
0
Humidity: 46%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 54%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 61%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 64%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 67%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 17.86 µg/m³
  • PM10: 25.26 µg/m³
  • O3: 0.070 ppm
  • NO2: 0.6 ppb
  • SO2: 0.8 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.

5 PM
114 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.05 µg/m³
  • PM10: 26.38 µg/m³
  • O3: 0.074 ppm
  • NO2: 0.9 ppb
  • SO2: 1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

6 PM
120 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.73 µg/m³
  • PM10: 26.7 µg/m³
  • O3: 0.076 ppm
  • NO2: 1.4 ppb
  • SO2: 1.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

7 PM
112 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 19.25 µg/m³
  • PM10: 25.78 µg/m³
  • O3: 0.074 ppm
  • NO2: 1.5 ppb
  • SO2: 1.1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

8 PM
96 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 17.97 µg/m³
  • PM10: 24.25 µg/m³
  • O3: 0.069 ppm
  • NO2: 1.6 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 17.03 µg/m³
  • PM10: 23.23 µg/m³
  • O3: 0.064 ppm
  • NO2: 1.7 ppb
  • SO2: 1 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

10 PM
72 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 16.55 µg/m³
  • PM10: 22.73 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.8 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 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: 16.14 µg/m³
  • PM10: 22.25 µg/m³
  • O3: 0.058 ppm
  • NO2: 2 ppb
  • SO2: 0.9 ppb
  • CO: 0.18 ppm

Health Recommendations:

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