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Ojiya (Niigata) (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

Intensywny deszcz
16°C
Intensywny deszcz
Humidity
96.3%
Wind
4 m/s
Pressure
997.5 hPa
Direction
170°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
12° / 19°
Precip.
4.1mm
Max wind
9.2 m/s

Hourly Forecast

10.04
Now
Weather
16°
1.5
10.04
08:00
Weather
15°
1.2
10.04
09:00
Weather
14°
0.3
10.04
10:00
Weather
13°
10.04
11:00
Weather
13°
10.04
12:00
Weather
13°
8
10.04
13:00
Weather
13°
0.2
8
10.04
14:00
Weather
13°
9
10.04
15:00
Weather
13°
0.3
8
10.04
16:00
Weather
13°
0.2
9
10.04
17:00
Weather
13°
8
10.04
18:00
Weather
13°
7
10.04
19:00
Weather
12°
0.4
6
10.04
20:00
Weather
12°
5
10.04
21:00
Weather
13°
10.04
22:00
Weather
13°
5
10.04
23:00
Weather
13°
7
11.04
00:00
Weather
15°
9
11.04
01:00
Weather
16°
9
11.04
02:00
Weather
17°
8
11.04
03:00
Weather
19°
9
11.04
04:00
Weather
19°
9
11.04
05:00
Weather
19°
9
11.04
06:00
Weather
17°
9

Temperature

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

Precipitation

1.5mm
0mm
07:00
1.5mm
08:00
1.2mm
09:00
0.3mm
13:00
0.2mm
15:00
0.3mm
16:00
0.2mm
19:00
0.4mm
07:00 18:00 06:00

Wind

9.2m/s
0m/s
07:00
4.1 m/s
08:00
3 m/s
09:00
2.6 m/s
10:00
2 m/s
11:00
4 m/s
12:00
8 m/s
13:00
8.2 m/s
14:00
8.5 m/s
15:00
8.4 m/s
16:00
8.5 m/s
17:00
7.7 m/s
18:00
7 m/s
19:00
5.9 m/s
20:00
5.1 m/s
21:00
4.9 m/s
22:00
5.4 m/s
23:00
7.2 m/s
00:00
8.8 m/s
01:00
9 m/s
02:00
8.4 m/s
03:00
8.7 m/s
04:00
9.1 m/s
05:00
9.1 m/s
06:00
9.2 m/s
07:00 18:00 06:00

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
66 km
10
3.3%

Measurement time: 2026-04-10 08:02

Calculated from PM2.5/PM10

O3
66 km
80.96 µg/m3
50.6%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

PM2.5
66 km
2.59 µg/m3
3.1%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

PM10
66 km
2.75 µg/m3
2%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

NO2
66 km
2.85 µg/m3
1.4%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

CO
66 km
0.14288 mg/m3
1%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

SO2
66 km
0.62 µg/m3
0.2%

Measurement time: 2026-04-10 08:02

source: OpenWeatherMap

Info


Country: Japan
Region: Niigata
Latitude: 37.3
Longitude: 138.8


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About Air Quality in Ojiya

Air quality in Ojiya 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 Ojiya

  • 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 Ojiya?

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 Ojiya

If you're planning outdoor activities in Ojiya, 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.