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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
6°C
Clear sky
Humidity
63.8%
Wind
2 m/s
Pressure
1024.6 hPa
Direction
129°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
3° / 13°
Precip.
0mm
Max wind
3 m/s

Hourly Forecast

04.02
Now
Weather
04.02
09:00
Weather
04.02
10:00
Weather
04.02
11:00
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04.02
12:00
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04.02
13:00
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04.02
14:00
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04.02
15:00
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04.02
16:00
Weather
04.02
17:00
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04.02
18:00
Weather
04.02
19:00
Weather
04.02
20:00
Weather
11°
04.02
21:00
Weather
12°
04.02
22:00
Weather
13°
04.02
23:00
Weather
13°
05.02
00:00
Weather
12°
05.02
01:00
Weather
10°
05.02
02:00
Weather
05.02
03:00
Weather
05.02
04:00
Weather
05.02
05:00
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05.02
06:00
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05.02
07:00
Weather

Temperature

13°C
3°C
08:00
6°C
09:00
6°C
10:00
6°C
11:00
6°C
12:00
6°C
13:00
5°C
14:00
4°C
15:00
3°C
16:00
4°C
17:00
7°C
18:00
8°C
19:00
9°C
20:00
11°C
21:00
12°C
22:00
13°C
23:00
13°C
00:00
12°C
01:00
10°C
02:00
6°C
03:00
6°C
04:00
6°C
05:00
6°C
06:00
5°C
07:00
5°C
08:00 19:00 07:00

Precipitation

0mm
0mm
08:00 19:00 07:00

Wind

3m/s
0m/s
08:00
2 m/s
09:00
2.2 m/s
10:00
2.3 m/s
11:00
2.1 m/s
12:00
1.9 m/s
13:00
2 m/s
14:00
1.8 m/s
15:00
2 m/s
16:00
2.2 m/s
17:00
2.5 m/s
18:00
2.6 m/s
19:00
2.7 m/s
20:00
2.9 m/s
21:00
3 m/s
22:00
2.8 m/s
23:00
2.7 m/s
00:00
2.6 m/s
01:00
2.2 m/s
02:00
1.7 m/s
03:00
1.4 m/s
04:00
1.3 m/s
05:00
1.5 m/s
06:00
1.6 m/s
07:00
1.7 m/s
08:00 19:00 07:00

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
45.1 km
157
52.3%

Measurement time: 2026-02-04 07:00

Calculated from PM2.5/PM10

PM2.5
45.1 km
68 µg/m3
81%

Measurement time: 2026-02-04 07:00

source: Aqicn

O3
55.7 km
78.33 µg/m3
49%

Measurement time: 2026-02-04 07:42

source: OpenWeatherMap

PM10
56.1 km
60.41 µg/m3
43.2%

Measurement time: 2026-02-04 07:21

source: OpenWeatherMap

NO2
56.1 km
44.04 µg/m3
22%

Measurement time: 2026-02-04 07:21

source: OpenWeatherMap

CO
56.1 km
0.49035 mg/m3
3.5%

Measurement time: 2026-02-04 07:21

source: OpenWeatherMap

SO2
56.1 km
2.87 µg/m3
0.8%

Measurement time: 2026-02-04 07:21

source: OpenWeatherMap

Info


Region: California
Latitude: 37.94103
Longitude: -121.93579

Cities in the area:


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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.