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Belmont (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

سماء صافية
16°C
سماء صافية
Humidity
78.6%
Wind
4 m/s
Pressure
1012.8 hPa
Direction
252°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
12° / 17°
Precip.
26.1mm
Max wind
6.8 m/s

Hourly Forecast

10.04
Now
Weather
16°
10.04
03:00
Weather
14°
10.04
04:00
Weather
14°
10.04
05:00
Weather
14°
10.04
06:00
Weather
14°
10.04
07:00
Weather
13°
10.04
08:00
Weather
14°
10.04
09:00
Weather
14°
10.04
10:00
Weather
14°
1.8
10.04
11:00
Weather
13°
7.3
10.04
12:00
Weather
12°
4.7
10.04
13:00
Weather
12°
2.3
5
10.04
14:00
Weather
12°
3.8
10.04
15:00
Weather
13°
2
10.04
16:00
Weather
13°
0.3
10.04
17:00
Weather
15°
0.2
10.04
18:00
Weather
15°
0.2
10.04
19:00
Weather
17°
0.2
5
10.04
20:00
Weather
17°
2.3
6
10.04
21:00
Weather
16°
0.4
6
10.04
22:00
Weather
16°
0.4
6
10.04
23:00
Weather
15°
0.2
7
11.04
00:00
Weather
15°
6
11.04
01:00
Weather
15°
6

Temperature

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

Precipitation

7.3mm
0mm
10:00
1.8mm
11:00
7.3mm
12:00
4.7mm
13:00
2.3mm
14:00
3.8mm
15:00
2mm
16:00
0.3mm
17:00
0.2mm
18:00
0.2mm
19:00
0.2mm
20:00
2.3mm
21:00
0.4mm
22:00
0.4mm
23:00
0.2mm
02:00 13:00 01:00

Wind

6.8m/s
0m/s
02:00
3.9 m/s
03:00
3.2 m/s
04:00
3 m/s
05:00
2.7 m/s
06:00
2.1 m/s
07:00
2 m/s
08:00
2.2 m/s
09:00
2.6 m/s
10:00
2.9 m/s
11:00
3.7 m/s
12:00
4.4 m/s
13:00
5.1 m/s
14:00
3.3 m/s
15:00
2.9 m/s
16:00
4.1 m/s
17:00
4.1 m/s
18:00
4.7 m/s
19:00
5.2 m/s
20:00
5.6 m/s
21:00
6 m/s
22:00
6.1 m/s
23:00
6.8 m/s
00:00
6.4 m/s
01:00
5.7 m/s
02:00 13:00 01:00

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
7.6 km
20
6.7%

Measurement time: 2026-04-10 02:00

Calculated from PM2.5/PM10

O3
7.6 km
16.8 µg/m3
10.5%

Measurement time: 2026-04-10 02:00

source: Aqicn

PM2.5
7.6 km
5 µg/m3
6%

Measurement time: 2026-04-10 02:00

source: Aqicn

NO2
7.6 km
1.1 µg/m3
0.6%

Measurement time: 2026-04-10 02:00

source: Aqicn

CO
7.6 km
0.0023 mg/m3
0%

Measurement time: 2026-04-10 02:00

source: Aqicn

Info


Region: California
Latitude: 37.52021
Longitude: -122.2758


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About Air Quality in Belmont

Air quality in Belmont 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 Belmont

  • 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 Belmont?

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 Belmont

If you're planning outdoor activities in Belmont, 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.