Hourly Weather | Today › Saturday, October 24, 2026
Fullerton, California
3 PM
Sunny Weather
81°
Feels Like 82°
0
Humidity: 36%
UV Index: 3
Wind: 7 mph
4 PM
Sunny Weather
79°
Feels Like 81°
0
Humidity: 39%
UV Index: 2
Wind: 7 mph
5 PM
Sunny Weather
77°
Feels Like 75°
0
Humidity: 43%
UV Index: 1
Wind: 8 mph
6 PM
Sunny Weather
73°
Feels Like 73°
0
Humidity: 47%
UV Index: 0
Wind: 7 mph
7 PM
Night
72°
Feels Like 70°
0
Humidity: 54%
UV Index: 0
Wind: 5 mph
8 PM
Night
70°
Feels Like 66°
0
Humidity: 61%
UV Index: 0
Wind: 5 mph
9 PM
Night
66°
Feels Like 64°
0
Humidity: 68%
UV Index: 0
Wind: 5 mph
10 PM
Night
64°
Feels Like 64°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
11 PM
Night
64°
Feels Like 64°
0
Humidity: 76%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 13.08 µg/m³
  • PM10: 17.39 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.3 ppb
  • SO2: 0.8 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.

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

Pollutant Concentrations:

  • PM2.5: 12 µg/m³
  • PM10: 16.6 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.3 ppb
  • SO2: 0.7 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.

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

Pollutant Concentrations:

  • PM2.5: 10.34 µg/m³
  • PM10: 15.26 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.4 ppb
  • SO2: 0.6 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
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 8.48 µg/m³
  • PM10: 13.51 µg/m³
  • O3: 0.058 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.

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

Pollutant Concentrations:

  • PM2.5: 7.02 µg/m³
  • PM10: 12.14 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.28 µg/m³
  • PM10: 11.43 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.18 µg/m³
  • PM10: 11.39 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.49 µg/m³
  • PM10: 11.9 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.99 µg/m³
  • PM10: 12.66 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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