Is time to run? ⚠️☢️☣️

Clayton (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

Clear sky
10°C
Clear sky
Humidity
86.1%
Wind
3 m/s
Pressure
1013.3 hPa
Direction
266°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
7° / 14°
Precip.
7.4mm
Max wind
6.8 m/s

Hourly Forecast

10.04
Now
Weather
10°
10.04
05:00
Weather
10.04
06:00
Weather
10.04
07:00
Weather
10.04
08:00
Weather
10.04
09:00
Weather
10.04
10:00
Weather
10.04
11:00
Weather
10.04
12:00
Weather
10.04
13:00
Weather
0.2
10.04
14:00
Weather
0.4
10.04
15:00
Weather
1.8
10.04
16:00
Weather
1.9
10.04
17:00
Weather
11°
0.2
10.04
18:00
Weather
13°
0.2
10.04
19:00
Weather
13°
1.4
10.04
20:00
Weather
13°
0.4
10.04
21:00
Weather
14°
0.7
6
10.04
22:00
Weather
13°
6
10.04
23:00
Weather
14°
0.2
6
11.04
00:00
Weather
13°
7
11.04
01:00
Weather
12°
6
11.04
02:00
Weather
10°
11.04
03:00
Weather

Temperature

14°C
7°C
04:00
10°C
05:00
9°C
06:00
9°C
07:00
9°C
08:00
9°C
09:00
8°C
10:00
7°C
11:00
8°C
12:00
8°C
13:00
8°C
14:00
8°C
15:00
9°C
16:00
9°C
17:00
11°C
18:00
13°C
19:00
13°C
20:00
13°C
21:00
14°C
22:00
13°C
23:00
14°C
00:00
13°C
01:00
12°C
02:00
10°C
03:00
9°C
04:00 15:00 03:00

Precipitation

1.9mm
0mm
13:00
0.2mm
14:00
0.4mm
15:00
1.8mm
16:00
1.9mm
17:00
0.2mm
18:00
0.2mm
19:00
1.4mm
20:00
0.4mm
21:00
0.7mm
23:00
0.2mm
04:00 15:00 03:00

Wind

6.8m/s
0m/s
04:00
2.5 m/s
05:00
3.1 m/s
06:00
2.6 m/s
07:00
2.2 m/s
08:00
2 m/s
09:00
1.6 m/s
10:00
1.4 m/s
11:00
1.5 m/s
12:00
2.7 m/s
13:00
2.4 m/s
14:00
4 m/s
15:00
2.6 m/s
16:00
2.8 m/s
17:00
2.8 m/s
18:00
4.2 m/s
19:00
5 m/s
20:00
4.6 m/s
21:00
6.2 m/s
22:00
6.4 m/s
23:00
6.4 m/s
00:00
6.8 m/s
01:00
6.4 m/s
02:00
4.7 m/s
03:00
4 m/s
04:00 15:00 03:00

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
62.6 km
59
19.7%

Measurement time: 2026-04-10 04:00

Calculated from PM2.5/PM10

O3
64.5 km
72.71 µg/m3
45.4%

Measurement time: 2026-04-10 04:00

source: OpenWeatherMap

PM2.5
62.6 km
16 µg/m3
19%

Measurement time: 2026-04-10 04:00

source: Aqicn

PM10
62.6 km
18 µg/m3
12.9%

Measurement time: 2026-04-10 04:00

source: Aqicn

NO2
56.1 km
3.95 µg/m3
2%

Measurement time: 2026-04-10 06:11

source: OpenWeatherMap

CO
56.1 km
0.12265 mg/m3
0.9%

Measurement time: 2026-04-10 06:11

source: OpenWeatherMap

SO2
56.1 km
0.88 µg/m3
0.3%

Measurement time: 2026-04-10 06:11

source: OpenWeatherMap

Info


Region: California
Latitude: 37.94103
Longitude: -121.93579

Cities in the area:


Solar Energy

Night
0 W/m²
Solar Radiation
Solar Calculator
Calculate energy production for Clayton

About Air Quality in Clayton

Air quality in Clayton 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 Clayton

  • 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 Clayton?

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 Clayton

If you're planning outdoor activities in Clayton, 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.