Hourly Weather | Today Monday, April 27, 2026
Lake Forest, California
5 PM
Cloudy Weather
64°
Feels Like 64°
0
Humidity: 48%
UV Index: 3
Wind: 10 mph
6 PM
Cloudy Weather
63°
Feels Like 63°
0
Humidity: 52%
UV Index: 2
Wind: 9 mph
7 PM
Cloudy Weather
61°
Feels Like 59°
0
Humidity: 57%
UV Index: 1
Wind: 8 mph
8 PM
Cloudy Night
59°
Feels Like 57°
0
Humidity: 62%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Night
55°
Feels Like 55°
0
Humidity: 69%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
55°
Feels Like 54°
0
Humidity: 75%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
54°
Feels Like 54°
0
Humidity: 78%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

5 PM
79 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.28 µg/m³
  • PM10: 2.76 µg/m³
  • O3: 0.063 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
81 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.33 µg/m³
  • PM10: 3.03 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

7 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.38 µg/m³
  • PM10: 3.34 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

8 PM
84 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.43 µg/m³
  • PM10: 3.69 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 4.04 µg/m³
  • O3: 0.065 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 PM
83 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.55 µg/m³
  • PM10: 4.36 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 PM
82 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.6 µg/m³
  • PM10: 4.61 µg/m³
  • O3: 0.064 ppm
  • NO2: 0.1 ppb
  • SO2: 0.2 ppb
  • CO: 0.11 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.