Hourly Weather | Today Tuesday, April 7, 2026
San Marcos, California
2 PM
Cloudy Weather
72°
Feels Like 79°
0
Humidity: 51%
UV Index: 8
Wind: 9 mph
3 PM
Cloudy Weather
72°
Feels Like 75°
0
Humidity: 47%
UV Index: 5
Wind: 9 mph
4 PM
Cloudy Weather
72°
Feels Like 73°
0
Humidity: 49%
UV Index: 4
Wind: 8 mph
5 PM
Cloudy Weather
72°
Feels Like 72°
0
Humidity: 50%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
70°
Feels Like 70°
0
Humidity: 53%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
66°
Feels Like 64°
0
Humidity: 63%
UV Index: 0
Wind: 6 mph
8 PM
Cloudy Night
64°
Feels Like 63°
0
Humidity: 68%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Night
61°
Feels Like 61°
0
Humidity: 74%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
57°
Feels Like 57°
0
Humidity: 80%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 87%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 7.29 µg/m³
  • PM10: 22.16 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.7 µg/m³
  • PM10: 22.73 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.02 µg/m³
  • PM10: 23.21 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8.21 µg/m³
  • PM10: 23.43 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 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: 8.23 µg/m³
  • PM10: 23.29 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 8 µg/m³
  • PM10: 22.71 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 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: 7.55 µg/m³
  • PM10: 21.85 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.2 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.08 µg/m³
  • PM10: 21.05 µg/m³
  • O3: 0.053 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.64 µg/m³
  • PM10: 20.36 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 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: 6.24 µg/m³
  • PM10: 19.7 µg/m³
  • O3: 0.052 ppm
  • NO2: 0.3 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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