Hourly Weather | Today Tuesday, September 30, 2025
Fullerton, California
4 AM
Cloudy Weather
63°
Feels Like 64°
7
Humidity: 86%
Wind: 5 mph
UV Index: 0
5 AM
Cloudy Weather
63°
Feels Like 63°
7
Humidity: 87%
Wind: 4 mph
UV Index: 0
6 AM
Cloudy Weather
63°
Feels Like 63°
7
Humidity: 88%
Wind: 4 mph
UV Index: 0
7 AM
Cloudy Weather
63°
Feels Like 63°
5
Humidity: 90%
Wind: 4 mph
UV Index: 0
8 AM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 80%
Wind: 4 mph
UV Index: 3
9 AM
Cloudy Weather
66°
Feels Like 66°
0
Humidity: 75%
Wind: 4 mph
UV Index: 8
10 AM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 68%
Wind: 5 mph
UV Index: 15
11 AM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 62%
Wind: 5 mph
UV Index: 26
12 PM
Cloudy Weather
75°
Feels Like 81°
0
Humidity: 56%
Wind: 6 mph
UV Index: 50
1 PM
Cloudy Weather
77°
Feels Like 81°
0
Humidity: 52%
Wind: 7 mph
UV Index: 56
2 PM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 48%
Wind: 8 mph
UV Index: 50
3 PM
Cloudy Weather
79°
Feels Like 81°
0
Humidity: 50%
Wind: 9 mph
UV Index: 41
4 PM
Cloudy Weather
77°
Feels Like 79°
0
Humidity: 51%
Wind: 9 mph
UV Index: 29
5 PM
Cloudy Weather
75°
Feels Like 75°
0
Humidity: 53%
Wind: 9 mph
UV Index: 18
6 PM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 56%
Wind: 8 mph
UV Index: 8
7 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 62%
Wind: 7 mph
UV Index: 0
8 PM
Cloudy Night
70°
Feels Like 66°
0
Humidity: 68%
Wind: 6 mph
UV Index: 0
9 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 74%
Wind: 6 mph
UV Index: 0
10 PM
Cloudy Night
66°
Feels Like 63°
0
Humidity: 78%
Wind: 5 mph
UV Index: 0
11 PM
Cloudy Night
64°
Feels Like 64°
0
Humidity: 81%
Wind: 5 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

4 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.94 µg/m³
  • PM10: 20.05 µg/m³
  • O₃: 16.65 ppb
  • NO₂: 16.27 ppb
  • SO₂: 3.60 ppb
  • CO: 155.39 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 AM
52 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 16.44 µg/m³
  • PM10: 17.90 µg/m³
  • O₃: 13.46 ppb
  • NO₂: 15.80 ppb
  • SO₂: 4.32 ppb
  • CO: 156.05 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 AM
53 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 17.30 µg/m³
  • PM10: 18.51 µg/m³
  • O₃: 13.52 ppb
  • NO₂: 15.44 ppb
  • SO₂: 4.42 ppb
  • CO: 163.56 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 AM
54 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 18.58 µg/m³
  • PM10: 19.59 µg/m³
  • O₃: 13.58 ppb
  • NO₂: 15.09 ppb
  • SO₂: 4.52 ppb
  • CO: 171.07 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 AM
55 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 19.22 µg/m³
  • PM10: 20.28 µg/m³
  • O₃: 13.64 ppb
  • NO₂: 14.73 ppb
  • SO₂: 4.62 ppb
  • CO: 178.58 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 AM
56 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 16.98 µg/m³
  • PM10: 18.12 µg/m³
  • O₃: 20.32 ppb
  • NO₂: 12.00 ppb
  • SO₂: 3.78 ppb
  • CO: 169.47 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

10 AM
56 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.36 µg/m³
  • PM10: 15.75 µg/m³
  • O₃: 27.00 ppb
  • NO₂: 9.26 ppb
  • SO₂: 2.94 ppb
  • CO: 160.35 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
56 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.89 µg/m³
  • PM10: 14.58 µg/m³
  • O₃: 33.68 ppb
  • NO₂: 6.53 ppb
  • SO₂: 2.10 ppb
  • CO: 151.24 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.68 µg/m³
  • PM10: 14.58 µg/m³
  • O₃: 38.50 ppb
  • NO₂: 5.88 ppb
  • SO₂: 2.10 ppb
  • CO: 148.72 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 12.91 µg/m³
  • PM10: 14.79 µg/m³
  • O₃: 43.32 ppb
  • NO₂: 5.23 ppb
  • SO₂: 2.10 ppb
  • CO: 146.21 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
57 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.43 µg/m³
  • PM10: 15.27 µg/m³
  • O₃: 48.14 ppb
  • NO₂: 4.59 ppb
  • SO₂: 2.09 ppb
  • CO: 143.69 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.99 µg/m³
  • PM10: 15.76 µg/m³
  • O₃: 48.27 ppb
  • NO₂: 5.29 ppb
  • SO₂: 2.40 ppb
  • CO: 146.01 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 PM
58 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.43 µg/m³
  • PM10: 16.10 µg/m³
  • O₃: 48.40 ppb
  • NO₂: 5.99 ppb
  • SO₂: 2.71 ppb
  • CO: 148.34 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
59 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.73 µg/m³
  • PM10: 16.35 µg/m³
  • O₃: 48.53 ppb
  • NO₂: 6.69 ppb
  • SO₂: 3.02 ppb
  • CO: 150.66 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
59 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 15.05 µg/m³
  • PM10: 16.62 µg/m³
  • O₃: 42.57 ppb
  • NO₂: 9.63 ppb
  • SO₂: 3.37 ppb
  • CO: 159.07 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
60 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 15.43 µg/m³
  • PM10: 16.78 µg/m³
  • O₃: 36.61 ppb
  • NO₂: 12.56 ppb
  • SO₂: 3.72 ppb
  • CO: 167.49 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

8 PM
60 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 15.46 µg/m³
  • PM10: 16.49 µg/m³
  • O₃: 30.65 ppb
  • NO₂: 15.50 ppb
  • SO₂: 4.07 ppb
  • CO: 175.90 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

9 PM
61 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 15.93 µg/m³
  • PM10: 16.75 µg/m³
  • O₃: 25.43 ppb
  • NO₂: 18.68 ppb
  • SO₂: 4.44 ppb
  • CO: 184.11 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.