Hourly Weather | Today Monday, October 20, 2025
Fullerton, California
12 PM
Sunny Weather
81°
Feels Like 84°
0
Humidity: 35%
Wind: 5 mph
UV Index: 41
1 PM
Sunny Weather
82°
Feels Like 86°
0
Humidity: 36%
Wind: 6 mph
UV Index: 43
2 PM
Sunny Weather
82°
Feels Like 86°
0
Humidity: 32%
Wind: 6 mph
UV Index: 41
3 PM
Sunny Weather
84°
Feels Like 86°
0
Humidity: 31%
Wind: 7 mph
UV Index: 33
4 PM
Sunny Weather
82°
Feels Like 82°
0
Humidity: 33%
Wind: 7 mph
UV Index: 23
5 PM
Sunny Weather
81°
Feels Like 81°
0
Humidity: 37%
Wind: 7 mph
UV Index: 14
6 PM
Sunny Weather
79°
Feels Like 75°
0
Humidity: 43%
Wind: 6 mph
UV Index: 5
7 PM
Night
73°
Feels Like 72°
0
Humidity: 51%
Wind: 5 mph
UV Index: 0
8 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 57%
Wind: 5 mph
UV Index: 0
9 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 65%
Wind: 4 mph
UV Index: 0
10 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 72%
Wind: 4 mph
UV Index: 0
11 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 77%
Wind: 4 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

12 PM
51 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 12.41 µg/m³
  • PM10: 22.44 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.46 µg/m³
  • PM10: 23.37 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

2 PM
55 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.3 µg/m³
  • PM10: 24.13 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

3 PM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.84 µg/m³
  • PM10: 24.62 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.14 µg/m³
  • PM10: 24.89 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.33 µg/m³
  • PM10: 25.12 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

6 PM
58 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.53 µg/m³
  • PM10: 25.34 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 15.48 µg/m³
  • PM10: 25.31 µg/m³
  • O3: 0.054 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 15.06 µg/m³
  • PM10: 24.94 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 14.33 µg/m³
  • PM10: 24.24 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.72 µg/m³
  • PM10: 23.74 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 13.21 µg/m³
  • PM10: 23.24 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.10 ppm

Health Recommendations:

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