Hourly Weather | Today Thursday, February 5, 2026
Tustin, California
5 PM
Cloudy Weather
75°
Feels Like 73°
7
Humidity: 32%
UV Index: 0
Wind: 13 mph
6 PM
Cloudy Night
73°
Feels Like 70°
5
Humidity: 39%
UV Index: 0
Wind: 10 mph
7 PM
Cloudy Weather
70°
Feels Like 66°
0
Humidity: 55%
UV Index: 0
Wind: 9 mph
8 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 59%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 64%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
63°
Feels Like 61°
0
Humidity: 69%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 71%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 PM
154 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 62.34 µg/m³
  • PM10: 86.58 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.4 ppb
  • SO2: 0.1 ppb
  • CO: 0.29 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

6 PM
153 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 60.88 µg/m³
  • PM10: 87.33 µg/m³
  • O3: 0.060 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.27 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

7 PM
151 AQI
Unhealthy air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 58.04 µg/m³
  • PM10: 86.25 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.26 ppm

Health Recommendations:

Everyone may begin to experience health effects; sensitive groups may experience more serious effects.

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

Pollutant Concentrations:

  • PM2.5: 53.78 µg/m³
  • PM10: 82.98 µg/m³
  • O3: 0.058 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.24 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 49.3 µg/m³
  • PM10: 78.37 µg/m³
  • O3: 0.057 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.22 ppm

Health Recommendations:

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

10 PM
124 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 45.05 µg/m³
  • PM10: 73.31 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.21 ppm

Health Recommendations:

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

11 PM
113 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 40.51 µg/m³
  • PM10: 67.59 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.19 ppm

Health Recommendations:

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