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Belvidere (Illinois) (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
59.4%
Wind
2 m/s
Pressure
1031.5 hPa
Direction
349°
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
-13° / -4°
Precip.
1.9mm
Max wind
5.7 m/s

Hourly Forecast

04.02
Now
Weather
-6°
04.02
20:00
Weather
-6°
04.02
21:00
Weather
-6°
04.02
22:00
Weather
-7°
04.02
23:00
Weather
-9°
05.02
00:00
Weather
-11°
05.02
01:00
Weather
-11°
05.02
02:00
Weather
-12°
05.02
03:00
Weather
-13°
05.02
04:00
Weather
-13°
05.02
05:00
Weather
-13°
05.02
06:00
Weather
-13°
05.02
07:00
Weather
-13°
05.02
08:00
Weather
-11°
05.02
09:00
Weather
-10°
05.02
10:00
Weather
-9°
05.02
11:00
Weather
-8°
05.02
12:00
Weather
-8°
05.02
13:00
Weather
-7°
0.2
05.02
14:00
Weather
-7°
0.7
05.02
15:00
Weather
-6°
1
05.02
16:00
Weather
-6°
6
05.02
17:00
Weather
-4°
5
05.02
18:00
Weather
-4°
6

Temperature

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

Precipitation

1mm
0mm
13:00
0.2mm
14:00
0.7mm
15:00
1mm
19:00 06:00 18:00

Wind

5.7m/s
0m/s
19:00
1.6 m/s
20:00
2.2 m/s
21:00
1.7 m/s
22:00
1.3 m/s
23:00
1.2 m/s
00:00
0.8 m/s
01:00
0.4 m/s
02:00
0.8 m/s
03:00
1.4 m/s
04:00
1.9 m/s
05:00
2.1 m/s
06:00
2.2 m/s
07:00
2.3 m/s
08:00
2.6 m/s
09:00
2.8 m/s
10:00
3.2 m/s
11:00
3.7 m/s
12:00
3.8 m/s
13:00
3.4 m/s
14:00
3.3 m/s
15:00
3.9 m/s
16:00
5.5 m/s
17:00
5.1 m/s
18:00
5.7 m/s
19:00 06:00 18:00

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
49.9 km
41
13.7%

Measurement time: 2026-02-04 20:00

Calculated from PM2.5/PM10

O3
76.5 km
71.63 µg/m3
44.8%

Measurement time: 2026-02-04 19:52

source: OpenWeatherMap

PM2.5
49.9 km
10 µg/m3
11.9%

Measurement time: 2026-02-04 20:00

source: Aqicn

PM10
76.5 km
5.22 µg/m3
3.7%

Measurement time: 2026-02-04 19:52

source: OpenWeatherMap

NO2
76.5 km
3.39 µg/m3
1.7%

Measurement time: 2026-02-04 19:52

source: OpenWeatherMap

CO
76.5 km
0.17571 mg/m3
1.3%

Measurement time: 2026-02-04 19:52

source: OpenWeatherMap

SO2
76.5 km
1.64 µg/m3
0.5%

Measurement time: 2026-02-04 19:52

source: OpenWeatherMap

Info


Region: Illinois
Latitude: 42.26391
Longitude: -88.84427


Solar Energy

Moderate
349 W/m²
Solar Radiation
Solar Calculator
Calculate energy production for Belvidere

About Air Quality in Belvidere

Air quality in Belvidere 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 Belvidere

  • 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 Belvidere?

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 Belvidere

If you're planning outdoor activities in Belvidere, 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.