Hourly Weather | Today Tuesday, July 21, 2026
Tustin, California
2 AM
Cloudy Night
70°
Feels Like 70°
0
Humidity: 84%
UV Index: 0
Wind: 5 mph
3 AM
Cloudy Night
68°
Feels Like 68°
0
Humidity: 86%
UV Index: 0
Wind: 5 mph
4 AM
Cloudy Night
68°
Feels Like 68°
0
Humidity: 87%
UV Index: 0
Wind: 5 mph
5 AM
Cloudy Night
66°
Feels Like 66°
0
Humidity: 89%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 83%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 76%
UV Index: 1
Wind: 4 mph
8 AM
Cloudy Weather
73°
Feels Like 73°
0
Humidity: 70%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
77°
Feels Like 79°
0
Humidity: 63%
UV Index: 1
Wind: 6 mph
10 AM
Cloudy Weather
79°
Feels Like 82°
0
Humidity: 56%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
82°
Feels Like 90°
0
Humidity: 51%
UV Index: 7
Wind: 7 mph
12 PM
Cloudy Weather
84°
Feels Like 91°
0
Humidity: 47%
UV Index: 10
Wind: 8 mph
1 PM
Cloudy Weather
84°
Feels Like 93°
0
Humidity: 45%
UV Index: 11
Wind: 8 mph
2 PM
Cloudy Weather
86°
Feels Like 91°
0
Humidity: 43%
UV Index: 10
Wind: 9 mph
3 PM
Cloudy Weather
88°
Feels Like 91°
0
Humidity: 41%
UV Index: 8
Wind: 9 mph
4 PM
Cloudy Weather
86°
Feels Like 88°
0
Humidity: 42%
UV Index: 5
Wind: 9 mph
5 PM
Cloudy Weather
84°
Feels Like 86°
0
Humidity: 43%
UV Index: 3
Wind: 9 mph
6 PM
Cloudy Weather
82°
Feels Like 82°
0
Humidity: 46%
UV Index: 2
Wind: 8 mph
7 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 52%
UV Index: 1
Wind: 7 mph
8 PM
Cloudy Night
79°
Feels Like 75°
0
Humidity: 59%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
75°
Feels Like 73°
0
Humidity: 64%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
73°
Feels Like 73°
0
Humidity: 67%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
73°
Feels Like 72°
0
Humidity: 70%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

2 AM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 6.11 µg/m³
  • PM10: 15.3 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 AM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.9 µg/m³
  • PM10: 14.7 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 AM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.67 µg/m³
  • PM10: 13.99 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.49 µg/m³
  • PM10: 13.41 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.35 µg/m³
  • PM10: 12.96 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.26 µg/m³
  • PM10: 12.66 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 12.28 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 AM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.97 µg/m³
  • PM10: 11.7 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 AM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.82 µg/m³
  • PM10: 11.22 µg/m³
  • O3: 0.036 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 AM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.78 µg/m³
  • PM10: 11.06 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

12 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.84 µg/m³
  • PM10: 11.16 µg/m³
  • O3: 0.038 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

1 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.91 µg/m³
  • PM10: 11.28 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

2 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.92 µg/m³
  • PM10: 11.27 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

3 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.86 µg/m³
  • PM10: 11.05 µg/m³
  • O3: 0.040 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.71 µg/m³
  • PM10: 10.63 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.56 µg/m³
  • PM10: 10.28 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.42 µg/m³
  • PM10: 9.99 µg/m³
  • O3: 0.042 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.26 µg/m³
  • PM10: 9.68 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.21 µg/m³
  • PM10: 9.67 µg/m³
  • O3: 0.041 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.21 µg/m³
  • PM10: 9.89 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
35 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.2 µg/m³
  • PM10: 10.19 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
32 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.14 µg/m³
  • PM10: 10.31 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.07 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.