Hourly Weather | Today Tuesday, February 3, 2026
Santa Ana, California
6 PM
Night
72°
Feels Like 70°
0
Humidity: 49%
Wind: 5 mph
UV Index: 0
7 PM
Night
68°
Feels Like 66°
0
Humidity: 53%
Wind: 5 mph
UV Index: 0
8 PM
Night
64°
Feels Like 63°
0
Humidity: 55%
Wind: 6 mph
UV Index: 0
9 PM
Night
63°
Feels Like 61°
0
Humidity: 53%
Wind: 6 mph
UV Index: 0
10 PM
Night
61°
Feels Like 59°
0
Humidity: 50%
Wind: 7 mph
UV Index: 0
11 PM
Night
61°
Feels Like 57°
0
Humidity: 47%
Wind: 7 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

6 PM
160 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 64.78 µg/m³
  • PM10: 77.22 µg/m³
  • O3: 0.089 ppm
  • NO2: 0.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.32 ppm

Health Recommendations:

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

7 PM
155 AQI
Unhealthy air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 62.62 µg/m³
  • PM10: 75.09 µg/m³
  • O3: 0.087 ppm
  • NO2: 0.7 ppb
  • SO2: 0.4 ppb
  • CO: 0.31 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 59.96 µg/m³
  • PM10: 72.01 µg/m³
  • O3: 0.085 ppm
  • NO2: 0.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 56.9 µg/m³
  • PM10: 68.48 µg/m³
  • O3: 0.081 ppm
  • NO2: 0.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.30 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 53.47 µg/m³
  • PM10: 64.31 µg/m³
  • O3: 0.075 ppm
  • NO2: 0.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.29 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 50.51 µg/m³
  • PM10: 60.72 µg/m³
  • O3: 0.070 ppm
  • NO2: 0.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.28 ppm

Health Recommendations:

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