Hourly Weather | Today Tuesday, January 13, 2026
Fullerton, California
6 PM
Night
66°
Feels Like 64°
0
Humidity: 40%
Wind: 6 mph
UV Index: 0
7 PM
Night
64°
Feels Like 64°
0
Humidity: 48%
Wind: 5 mph
UV Index: 0
8 PM
Night
61°
Feels Like 61°
0
Humidity: 53%
Wind: 6 mph
UV Index: 0
9 PM
Night
59°
Feels Like 57°
0
Humidity: 55%
Wind: 6 mph
UV Index: 0
10 PM
Night
57°
Feels Like 55°
0
Humidity: 56%
Wind: 6 mph
UV Index: 0
11 PM
Night
57°
Feels Like 55°
0
Humidity: 53%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 PM
137 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 50.27 µg/m³
  • PM10: 65.29 µg/m³
  • O3: 0.058 ppm
  • NO2: 14.4 ppb
  • SO2: 1.1 ppb
  • CO: 0.42 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

7 PM
127 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 46.03 µg/m³
  • PM10: 60.01 µg/m³
  • O3: 0.055 ppm
  • NO2: 10 ppb
  • SO2: 1 ppb
  • CO: 0.40 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

8 PM
116 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 41.65 µg/m³
  • PM10: 54.43 µg/m³
  • O3: 0.052 ppm
  • NO2: 7 ppb
  • SO2: 0.9 ppb
  • CO: 0.37 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

9 PM
105 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 37.24 µg/m³
  • PM10: 48.84 µg/m³
  • O3: 0.050 ppm
  • NO2: 5 ppb
  • SO2: 0.8 ppb
  • CO: 0.34 ppm

Health Recommendations:

Members of sensitive groups may experience health effects. The general public is less likely to be affected.

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

Pollutant Concentrations:

  • PM2.5: 32.63 µg/m³
  • PM10: 43.06 µg/m³
  • O3: 0.047 ppm
  • NO2: 3.7 ppb
  • SO2: 0.8 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 27.97 µg/m³
  • PM10: 37.28 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.9 ppb
  • SO2: 0.8 ppb
  • CO: 0.28 ppm

Health Recommendations:

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