Hourly Weather | Today Tuesday, February 24, 2026
Rialto, California
4 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 29%
UV Index: 2
Wind: 7 mph
5 PM
Cloudy Weather
73°
Feels Like 72°
0
Humidity: 35%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Night
70°
Feels Like 68°
0
Humidity: 42%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 50%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 55%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
63°
Feels Like 61°
0
Humidity: 60%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
61°
Feels Like 59°
0
Humidity: 65%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 68%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

4 PM
65 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.8 µg/m³
  • PM10: 27.76 µg/m³
  • O3: 0.059 ppm
  • NO2: 1.1 ppb
  • SO2: 0.4 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.

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

Pollutant Concentrations:

  • PM2.5: 18.92 µg/m³
  • PM10: 27.39 µg/m³
  • O3: 0.061 ppm
  • NO2: 1.9 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 19.76 µg/m³
  • PM10: 28.08 µg/m³
  • O3: 0.060 ppm
  • NO2: 3 ppb
  • SO2: 0.6 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

7 PM
69 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 20.82 µg/m³
  • PM10: 29.18 µg/m³
  • O3: 0.057 ppm
  • NO2: 3.6 ppb
  • SO2: 0.6 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

8 PM
75 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 23.61 µg/m³
  • PM10: 32.31 µg/m³
  • O3: 0.054 ppm
  • NO2: 4.1 ppb
  • SO2: 0.7 ppb
  • CO: 0.23 ppm

Health Recommendations:

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

9 PM
80 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 25.85 µg/m³
  • PM10: 34.77 µg/m³
  • O3: 0.051 ppm
  • NO2: 4.5 ppb
  • SO2: 0.7 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

10 PM
80 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 26.15 µg/m³
  • PM10: 35.1 µg/m³
  • O3: 0.048 ppm
  • NO2: 4.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.25 ppm

Health Recommendations:

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

11 PM
76 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 24.32 µg/m³
  • PM10: 32.98 µg/m³
  • O3: 0.045 ppm
  • NO2: 4.7 ppb
  • SO2: 0.6 ppb
  • CO: 0.24 ppm

Health Recommendations:

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