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Kōnosu (Saitama) (JP)

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

Cloudy
16°C
Cloudy
Humidity
62.5%
Wind
4 m/s
Pressure
1015 hPa
Direction
171°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
12° / 18°
Precip.
16.5mm
Max wind
6 m/s

Hourly Forecast

09.04
Now
Weather
16°
09.04
10:00
Weather
16°
09.04
11:00
Weather
16°
5
09.04
12:00
Weather
15°
6
09.04
13:00
Weather
15°
5
09.04
14:00
Weather
15°
5
09.04
15:00
Weather
15°
5
09.04
16:00
Weather
15°
1
09.04
17:00
Weather
14°
0.5
09.04
18:00
Weather
13°
1.2
09.04
19:00
Weather
13°
0.1
09.04
20:00
Weather
13°
09.04
21:00
Weather
12°
09.04
22:00
Weather
13°
09.04
23:00
Weather
14°
10.04
00:00
Weather
15°
0.2
10.04
01:00
Weather
15°
0.2
10.04
02:00
Weather
16°
1.4
10.04
03:00
Weather
17°
4.2
10.04
04:00
Weather
17°
2.9
10.04
05:00
Weather
18°
0.8
5
10.04
06:00
Weather
18°
1.5
6
10.04
07:00
Weather
18°
1.4
10.04
08:00
Weather
17°
1.1

Temperature

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

Precipitation

4.2mm
0mm
16:00
1mm
17:00
0.5mm
18:00
1.2mm
19:00
0.1mm
00:00
0.2mm
01:00
0.2mm
02:00
1.4mm
03:00
4.2mm
04:00
2.9mm
05:00
0.8mm
06:00
1.5mm
07:00
1.4mm
08:00
1.1mm
09:00 20:00 08:00

Wind

6m/s
0m/s
09:00
4.4 m/s
10:00
4.6 m/s
11:00
5.2 m/s
12:00
5.6 m/s
13:00
5.3 m/s
14:00
5.2 m/s
15:00
5.2 m/s
16:00
4.7 m/s
17:00
3.9 m/s
18:00
2.8 m/s
19:00
3.1 m/s
20:00
3.6 m/s
21:00
2.9 m/s
22:00
2.9 m/s
23:00
3.8 m/s
00:00
2.3 m/s
01:00
2.5 m/s
02:00
2.1 m/s
03:00
2.4 m/s
04:00
4.3 m/s
05:00
5.4 m/s
06:00
6 m/s
07:00
3.1 m/s
08:00
2.8 m/s
09:00 20:00 08:00

Radiation

0.059 uSv
50.4 km
7.4%

Measurement time: 2026-04-09 07:00

source: remap_europe

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
70.3 km
107
35.7%

Measurement time: 2026-04-09 10:00

Calculated from PM2.5/PM10

PM2.5
70.3 km
38 µg/m3
45.2%

Measurement time: 2026-04-09 10:00

source: Aqicn

O3
70.3 km
47.2 µg/m3
29.5%

Measurement time: 2026-04-09 10:00

source: Aqicn

PM10
70.3 km
15 µg/m3
10.7%

Measurement time: 2026-04-09 10:00

source: Aqicn

NO2
63.9 km
11.2 µg/m3
5.6%

Measurement time: 2026-04-09 10:00

source: Aqicn

SO2
70.3 km
2.9 µg/m3
0.8%

Measurement time: 2026-04-09 10:00

source: Aqicn

CO
43.6 km
0.0023 mg/m3
0%

Measurement time: 2026-04-09 10:00

source: Aqicn

About Air Quality in Kōnosu

Air quality in Kōnosu 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 Kōnosu

  • 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 Kōnosu?

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 Kōnosu

If you're planning outdoor activities in Kōnosu, 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.