Hourly Weather | Today Monday, April 6, 2026
Fullerton, California
8 AM
Cloudy Weather
63°
Feels Like 66°
0
Humidity: 66%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
66°
Feels Like 70°
0
Humidity: 63%
UV Index: 2
Wind: 6 mph
10 AM
Cloudy Weather
70°
Feels Like 73°
0
Humidity: 54%
UV Index: 4
Wind: 6 mph
11 AM
Cloudy Weather
73°
Feels Like 79°
0
Humidity: 46%
UV Index: 5
Wind: 7 mph
12 PM
Cloudy Weather
75°
Feels Like 82°
0
Humidity: 41%
UV Index: 7
Wind: 8 mph
1 PM
Cloudy Weather
79°
Feels Like 84°
0
Humidity: 38%
UV Index: 8
Wind: 9 mph
2 PM
Cloudy Weather
81°
Feels Like 84°
0
Humidity: 35%
UV Index: 7
Wind: 10 mph
3 PM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 37%
UV Index: 5
Wind: 10 mph
4 PM
Cloudy Weather
79°
Feels Like 79°
0
Humidity: 38%
UV Index: 4
Wind: 9 mph
5 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 41%
UV Index: 2
Wind: 9 mph
6 PM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 44%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
72°
Feels Like 70°
0
Humidity: 51%
UV Index: 0
Wind: 8 mph
8 PM
Night
68°
Feels Like 66°
0
Humidity: 59%
UV Index: 0
Wind: 7 mph
9 PM
Night
64°
Feels Like 63°
0
Humidity: 67%
UV Index: 0
Wind: 7 mph
10 PM
Night
63°
Feels Like 63°
0
Humidity: 75%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
63°
Feels Like 61°
0
Humidity: 79%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 10.56 µg/m³
  • PM10: 27.35 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.3 ppb
  • SO2: 0.6 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 AM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.83 µg/m³
  • PM10: 26.24 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 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 AM
54 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.45 µg/m³
  • PM10: 25.28 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.4 ppb
  • SO2: 0.5 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 AM
56 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.38 µg/m³
  • PM10: 24.78 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.3 ppb
  • SO2: 0.5 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.

12 PM
59 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.41 µg/m³
  • PM10: 24.58 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
61 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.43 µg/m³
  • PM10: 24.66 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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.

2 PM
62 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 9.35 µg/m³
  • PM10: 24.69 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.1 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 9.04 µg/m³
  • PM10: 24.37 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.1 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 8.51 µg/m³
  • PM10: 23.58 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.1 ppb
  • SO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 7.92 µg/m³
  • PM10: 22.67 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.1 ppb
  • SO2: 0.5 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
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 7.35 µg/m³
  • PM10: 21.78 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.84 µg/m³
  • PM10: 21.04 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
63 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.48 µg/m³
  • PM10: 20.48 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.28 µg/m³
  • PM10: 20.25 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.26 µg/m³
  • PM10: 20.35 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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
64 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.33 µg/m³
  • PM10: 20.67 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.2 ppb
  • SO2: 0.5 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.