Air Quality in Niihama, Japan

Heavy Rain
19.0°C · 90.3% humidity
19.0°
Feels 19.0°
47
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
54 3am
54
54
47 6am
49
50
51 9am
81
82
65 12pm
65
66
66 3pm
54
54
54 6pm
54
54
54 9pm
54
54
54 12am
54
54
AD 728×90

Air Quality Index Trend

47h · 15 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. Current PM2.5 concentration in Niihama is 2.3× the WHO annual guideline of 5 µg/m³.

90.3%
Humidity
44.5 km/h
Wind ESE
1002.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
47
11.3 µg/m³
PM10▲
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Niihama?

Temperature & Precipitation

PM2.5 Trend

47h · 15 stations
PM2.511.3 µg/m³ ✓ WHO
Good
PM1066.15 µg/m³
Moderate
UV INDEX0.7
Low
AD 300×250
Station readings (6 stations within 25 km)
11.3
Median
9.57
Average
6.0
Low
12.0
High
PM2.5 µg/m³ · Model: 20.3 · Bias: +9.0

What is the 7-day forecast for Niihama?

05-28
20.0° 16.1°
15.44 mm
05-29
20.3° 18.5°
21.75 mm
05-30
21.0° 19.5°
3.0 mm
05-31
21.1° 19.0°
06-01
20.9° 19.4°
0.06 mm
06-02
21.3° 19.9°
0.31 mm
06-03
22.9° 18.6°
1.25 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Niihama?

42
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 10.1 µg/m³
1
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 0.2 µg/m³
21
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 5.0 µg/m³
9
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 2.2 µg/m³
25
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 6.0 µg/m³
9
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 2.2 µg/m³
21
Omachi, Saijo, Ehime, Japan (西条西条市)
11.5 km PM2.5: 5.0 µg/m³
55
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 14.0 µg/m³
44
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 10.6 µg/m³
34
Mishimamiyagawa, Shikokuchuo, Ehime, Japan (伊予三島四国中央市)
22.7 km PM2.5: 8.2 µg/m³

What cities are near Niihama?

25 Saijō 40 Shikokuchūō 41 Kawanoechō 38 Imabari 36 Kan’onjichō 40 Innoshima 39 Tōon 35 Mitoyo 44 Shinagawa 39 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 2026-05-28T21:38 UTC.