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Lake Forest (California) (US)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Pogodnie
15°C
Pogodnie
Humidity
93.1%
Wind
2 m/s
Pressure
1013.5 hPa
Direction
110°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
13° / 22°
Precip.
0.3mm
Max wind
4.8 m/s

Hourly Forecast

10.04
Now
Weather
15°
10.04
14:00
Weather
15°
10.04
15:00
Weather
17°
10.04
16:00
Weather
18°
10.04
17:00
Weather
20°
10.04
18:00
Weather
21°
10.04
19:00
Weather
22°
10.04
20:00
Weather
22°
10.04
21:00
Weather
22°
10.04
22:00
Weather
22°
10.04
23:00
Weather
21°
11.04
00:00
Weather
20°
11.04
01:00
Weather
19°
11.04
02:00
Weather
17°
11.04
03:00
Weather
16°
11.04
04:00
Weather
16°
11.04
05:00
Weather
16°
0.1
11.04
06:00
Weather
16°
0.1
11.04
07:00
Weather
16°
0.1
11.04
08:00
Weather
15°
11.04
09:00
Weather
14°
11.04
10:00
Weather
14°
11.04
11:00
Weather
14°
11.04
12:00
Weather
13°

Temperature

22°C
13°C
13:00
15°C
14:00
15°C
15:00
17°C
16:00
18°C
17:00
20°C
18:00
21°C
19:00
22°C
20:00
22°C
21:00
22°C
22:00
22°C
23:00
21°C
00:00
20°C
01:00
19°C
02:00
17°C
03:00
16°C
04:00
16°C
05:00
16°C
06:00
16°C
07:00
16°C
08:00
15°C
09:00
14°C
10:00
14°C
11:00
14°C
12:00
13°C
13:00 00:00 12:00

Precipitation

0.1mm
0mm
05:00
0.1mm
06:00
0.1mm
07:00
0.1mm
13:00 00:00 12:00

Wind

4.8m/s
0m/s
13:00
1.7 m/s
14:00
2.2 m/s
15:00
2.3 m/s
16:00
2.2 m/s
17:00
2.7 m/s
18:00
3.5 m/s
19:00
3.8 m/s
20:00
4.1 m/s
21:00
4.6 m/s
22:00
4.8 m/s
23:00
4 m/s
00:00
3.7 m/s
01:00
3.8 m/s
02:00
3.6 m/s
03:00
3.4 m/s
04:00
3.7 m/s
05:00
3.7 m/s
06:00
2.6 m/s
07:00
2 m/s
08:00
2.4 m/s
09:00
2.2 m/s
10:00
1.3 m/s
11:00
1 m/s
12:00
0.9 m/s
13:00 00:00 12:00

Radiation

No sensor within 100 km.

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
74.8 km
30
10%

Measurement time: 2026-04-10 13:36

Calculated from PM2.5/PM10

O3
63.1 km
67.33 µg/m3
42.1%

Measurement time: 2026-04-10 13:38

source: OpenWeatherMap

PM10
74.8 km
15.07 µg/m3
10.8%

Measurement time: 2026-04-10 13:36

source: OpenWeatherMap

PM2.5
74.8 km
7.26 µg/m3
8.6%

Measurement time: 2026-04-10 13:36

source: OpenWeatherMap

NO2
74.8 km
3.53 µg/m3
1.8%

Measurement time: 2026-04-10 13:36

source: OpenWeatherMap

CO
74.8 km
0.14523 mg/m3
1%

Measurement time: 2026-04-10 13:36

source: OpenWeatherMap

SO2
74.8 km
1.84 µg/m3
0.5%

Measurement time: 2026-04-10 13:36

source: OpenWeatherMap

Info

About Air Quality in Lake Forest

Air quality in Lake Forest is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Lake Forest

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Lake Forest?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Lake Forest

If you're planning outdoor activities in Lake Forest, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.