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Tosu (Saga) (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

Heavy rain
11°C
Heavy rain
Humidity
97.6%
Wind
6 m/s
Pressure
1008.7 hPa
Direction
Sunrise
05:00
Sunset
17:00
24h Forecast:
Temp.
9° / 13°
Precip.
8.3mm
Max wind
6.6 m/s

Hourly Forecast

27.02
Now
Weather
11°
3.7
6
27.02
07:00
Weather
11°
2.8
27.02
08:00
Weather
11°
1.4
27.02
09:00
Weather
11°
0.4
27.02
10:00
Weather
11°
6
27.02
11:00
Weather
11°
6
27.02
12:00
Weather
11°
6
27.02
13:00
Weather
11°
6
27.02
14:00
Weather
11°
6
27.02
15:00
Weather
10°
6
27.02
16:00
Weather
10°
6
27.02
17:00
Weather
10°
6
27.02
18:00
Weather
10°
5
27.02
19:00
Weather
27.02
20:00
Weather
27.02
21:00
Weather
27.02
22:00
Weather
5
27.02
23:00
Weather
6
28.02
00:00
Weather
6
28.02
01:00
Weather
10°
6
28.02
02:00
Weather
11°
7
28.02
03:00
Weather
12°
6
28.02
04:00
Weather
13°
6
28.02
05:00
Weather
13°
6

Temperature

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

Precipitation

3.7mm
0mm
06:00
3.7mm
07:00
2.8mm
08:00
1.4mm
09:00
0.4mm
06:00 17:00 05:00

Wind

6.6m/s
0m/s
06:00
5.7 m/s
07:00
4.9 m/s
08:00
4.5 m/s
09:00
4.6 m/s
10:00
5.6 m/s
11:00
5.8 m/s
12:00
5.9 m/s
13:00
6.1 m/s
14:00
6.4 m/s
15:00
5.9 m/s
16:00
5.8 m/s
17:00
5.6 m/s
18:00
5.2 m/s
19:00
4.8 m/s
20:00
4.7 m/s
21:00
4.8 m/s
22:00
5.1 m/s
23:00
5.8 m/s
00:00
6.2 m/s
01:00
6.2 m/s
02:00
6.6 m/s
03:00
6.4 m/s
04:00
5.9 m/s
05:00
5.8 m/s
06:00 17:00 05:00

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
28.3 km
107
35.7%

Measurement time: 2026-02-27 06:00

Calculated from PM2.5/PM10

PM2.5
28.3 km
38 µg/m3
45.2%

Measurement time: 2026-02-27 06:00

source: Aqicn

NO2
28.3 km
26.9 µg/m3
13.4%

Measurement time: 2026-02-27 06:00

source: Aqicn

PM10
28.3 km
11 µg/m3
7.9%

Measurement time: 2026-02-27 06:00

source: Aqicn

O3
28.3 km
5.6 µg/m3
3.5%

Measurement time: 2026-02-27 06:00

source: Aqicn

SO2
28.3 km
1.5 µg/m3
0.4%

Measurement time: 2026-02-27 06:00

source: Aqicn

CO
28.3 km
0.0056 mg/m3
0%

Measurement time: 2026-02-27 06:00

source: Aqicn

Info


Country: Japan
Region: Saga
Latitude: 33.36667
Longitude: 130.51667


Solar Energy

Low
151.2 W/m²
Solar Radiation
Solar Calculator
Calculate energy production for Tosu

About Air Quality in Tosu

Air quality in Tosu 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 Tosu

  • 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 Tosu?

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 Tosu

If you're planning outdoor activities in Tosu, 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.