Air Quality in Niihama, Japan

Drizzle
20.7°C · 78.8% humidity
20.7°
Feels 20.7°
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
54 5am
54
54
15 8am
13
17
20 11am
22
23
24 2pm
25
26
26 5pm
33
54
54 8pm
54
54
54 11pm
54
54
54 2am
54
54
AD 728×90

Air Quality Index Trend

47h · 18 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.

78.8%
Humidity
40.1 km/h
Wind NNW
1014.1 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
15
3.69 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Niihama?

Temperature & Precipitation

PM2.5 Trend

47h · 18 stations
PM2.53.69 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (6 stations within 25 km)
3.69
Median
4.52
Average
3.1
Low
5.8
High
PM2.5 µg/m³ · Model: 8.2 · Bias: +4.5

What is the 7-day forecast for Niihama?

06-08
23.1° 20.1°
06-09
21.6° 20.7°
1.25 mm
06-10
21.8° 19.7°
1.38 mm
06-11
21.9° 20.6°
0.06 mm
06-12
22.0° 20.8°
06-13
23.6° 20.2°
4.75 mm
06-14
22.2° 21.1°
2.56 mm
Both models agree Avg diff: 3.4°C

Where are air quality stations near Niihama?

27
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 6.5 µg/m³
21
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 5.0 µg/m³
46
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 11.0 µg/m³
25
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 6.0 µg/m³
24
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 5.8 µg/m³
55
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 14.0 µg/m³
37
Omachi, Saijo, Ehime, Japan (西条西条市)
11.5 km PM2.5: 8.9 µg/m³
27
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 6.5 µg/m³
26
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 6.2 µg/m³
46
Mishimamiyagawa, Shikokuchuo, Ehime, Japan (伊予三島四国中央市)
22.7 km PM2.5: 11.0 µg/m³

What cities are near Niihama?

20 Saijō 21 Shikokuchūō 19 Kawanoechō 9 Imabari 23 Kan’onjichō 30 Innoshima 21 Tōon 18 Mitoyo 13 Shinagawa 18 Ikedachō
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-08T23:24 UTC.