Hourly Weather | Today Thursday, February 5, 2026
Lake Forest, California
7 PM
Cloudy Night
68°
Feels Like 64°
8
Humidity: 70%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
66°
Feels Like 63°
5
Humidity: 63%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
63°
Feels Like 63°
5
Humidity: 61%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
61°
Feels Like 61°
5
Humidity: 64%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Night
59°
Feels Like 57°
5
Humidity: 68%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 57.97 µg/m³
  • PM10: 86.94 µg/m³
  • O3: 0.060 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
145 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 53.38 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
133 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 48.66 µg/m³
  • PM10: 77.95 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
122 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 44.29 µg/m³
  • PM10: 72.71 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
111 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 39.79 µg/m³
  • PM10: 66.94 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.