Air Quality in Niihama, Japan

Cloudy
26.3°C · 79.8% humidity
26.3°
Feels 26.3°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
24 8am
25
25
25 11am
27
27
27 2pm
27
34
34 5pm
34
34
34 8pm
27
34
27 11pm
27
27
27 2am
27
27
27 5am
27
27
AD 728×90

Air Quality Index Trend

42h · 12 stn

Niihama's air quality is influenced by industrial emissions, vehicle traffic, and regional pollution transport. Winter heating season and spring dust events typically create the most challenging air quality conditions.

79.8%
Humidity
22.2 km/h
Wind S
1005.4 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
5.9 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Niihama?

Temperature & Precipitation

PM2.5 Trend

42h · 12 stations
PM2.55.9 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250

What is the 7-day forecast for Niihama?

08-03
27.4° 24.2°
0.75 mm
08-04
28.6° 26.3°
2.38 mm
08-05
28.6° 26.1°
2.12 mm
08-06
27.5° 26.5°
0.63 mm
08-07
29.8° 26.4°
3.06 mm
08-08
28.3° 25.1°
3.56 mm
08-09
28.1° 25.2°
1.13 mm
Both models agree Avg diff: 1.7°C

Where are air quality stations near Niihama?

24
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 5.8 µg/m³
23
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 5.5 µg/m³
20
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 4.8 µg/m³
25
Mishimamiyagawa, Shikokuchuo, Ehime, Japan (伊予三島四国中央市)
22.7 km PM2.5: 6.0 µg/m³

What cities are near Niihama?

24 Saijō 24 Shikokuchūō 24 Kawanoechō 24 Imabari 24 Kan’onjichō 12 Innoshima 25 Tōon 25 Mitoyo 25 Shinagawa 24 Ikedachō
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T02:00 UTC.