Hourly Weather | Today Saturday, September 19, 2026
El Cajon, California
3 AM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 86%
UV Index: 0
Wind: 4 mph
4 AM
Cloudy Night
63°
Feels Like 63°
0
Humidity: 88%
UV Index: 0
Wind: 4 mph
5 AM
Cloudy Night
61°
Feels Like 63°
0
Humidity: 90%
UV Index: 0
Wind: 4 mph
6 AM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 91%
UV Index: 0
Wind: 4 mph
7 AM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 84%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 69%
UV Index: 1
Wind: 5 mph
9 AM
Cloudy Weather
70°
Feels Like 72°
0
Humidity: 70%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
73°
Feels Like 77°
0
Humidity: 61%
UV Index: 3
Wind: 6 mph
11 AM
Cloudy Weather
77°
Feels Like 82°
0
Humidity: 54%
UV Index: 5
Wind: 6 mph
12 PM
Cloudy Weather
81°
Feels Like 86°
0
Humidity: 49%
UV Index: 6
Wind: 7 mph
1 PM
Cloudy Weather
82°
Feels Like 88°
0
Humidity: 46%
UV Index: 7
Wind: 8 mph
2 PM
Cloudy Weather
84°
Feels Like 88°
0
Humidity: 43%
UV Index: 6
Wind: 9 mph
3 PM
Cloudy Weather
82°
Feels Like 86°
0
Humidity: 45%
UV Index: 5
Wind: 9 mph
4 PM
Cloudy Weather
82°
Feels Like 84°
0
Humidity: 47%
UV Index: 3
Wind: 8 mph
5 PM
Cloudy Weather
81°
Feels Like 81°
0
Humidity: 51%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
77°
Feels Like 77°
0
Humidity: 57%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Night
73°
Feels Like 73°
0
Humidity: 66%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
72°
Feels Like 70°
0
Humidity: 73%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
68°
Feels Like 66°
0
Humidity: 79%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 85%
UV Index: 0
Wind: 4 mph
11 PM
Cloudy Night
66°
Feels Like 64°
0
Humidity: 85%
UV Index: 0
Wind: 4 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 7 µg/m³
  • PM10: 20.05 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.18 µg/m³
  • PM10: 20.65 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 21.3 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.45 µg/m³
  • PM10: 21.8 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.51 µg/m³
  • PM10: 22.21 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.47 µg/m³
  • PM10: 22.38 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.38 µg/m³
  • PM10: 22.32 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.34 µg/m³
  • PM10: 22.28 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.35 µg/m³
  • PM10: 22.37 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.43 µg/m³
  • PM10: 22.65 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.63 µg/m³
  • PM10: 23.27 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.94 µg/m³
  • PM10: 24.07 µg/m³
  • O3: 0.048 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.31 µg/m³
  • PM10: 24.93 µg/m³
  • O3: 0.049 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.66 µg/m³
  • PM10: 25.6 µg/m³
  • O3: 0.050 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.98 µg/m³
  • PM10: 26.16 µg/m³
  • O3: 0.051 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.33 µg/m³
  • PM10: 26.88 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 9.7 µg/m³
  • PM10: 27.88 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.05 µg/m³
  • PM10: 29.11 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.26 µg/m³
  • PM10: 29.95 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.29 µg/m³
  • PM10: 30.2 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 10.2 µg/m³
  • PM10: 30.01 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

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