Air Quality in Niihama, Japan

Drizzle
25.2°C · 95.4% humidity
25.2°
Feels 25.2°
66
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast
34 5am
34
34
66 8am
63
60
58 11am
57
56
56 2pm
55
55
55 5pm
34
34
34 8pm
34
54
54 11pm
54
54
54 2am
54
54
AD 728×90

Air Quality Index Trend

45h · 10 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 1.3× the WHO 24-hour guideline of 15 µg/m³.

95.4%
Humidity
11.5 km/h
Wind NE
995.6 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
66
19.09 µg/m³
PM10
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Niihama?

Temperature & Precipitation

PM2.5 Trend

45h · 10 stations
PM2.519.09 µg/m³ ×1.3 WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (2 stations within 25 km)
19.09
Median
19.0
Average
17.8
Low
20.2
High
PM2.5 µg/m³ · Model: 16.35 · Bias: -2.7

What is the 7-day forecast for Niihama?

07-21
26.9° 24.8°
6.56 mm
07-22
27.9° 25.2°
3.81 mm
07-23
27.2° 22.7°
20.13 mm
07-24
27.4° 23.9°
2.81 mm
07-25
27.2° 25.3°
0.94 mm
07-26
27.0° 25.5°
0.25 mm
07-27
26.4° 25.5°
1.56 mm
Both models agree Avg diff: 2.2°C

Where are air quality stations near Niihama?

49
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 11.8 µg/m³
72
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 22.1 µg/m³
55
Kubotacho, Niihama, Ehime, Japan (金子新居浜市)
2.3 km PM2.5: 14.0 µg/m³
65
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 18.8 µg/m³
29
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 7.0 µg/m³
19
Hongo, Niihama, Ehime, Japan (中村新居浜市)
3.9 km PM2.5: 4.6 µg/m³
26
Omachi, Saijo, Ehime, Japan (西条西条市)
11.5 km PM2.5: 6.2 µg/m³
31
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 7.4 µg/m³
68
Nyugawa, Saijo, Ehime, Japan (東予西条市)
21.0 km PM2.5: 20.2 µg/m³
21
Mishimamiyagawa, Shikokuchuo, Ehime, Japan (伊予三島四国中央市)
22.7 km PM2.5: 5.0 µg/m³

What cities are near Niihama?

68 Saijō 63 Shikokuchūō 68 Kawanoechō 68 Imabari 63 Kan’onjichō 74 Innoshima 54 Tōon 66 Mitoyo 26 Shinagawa 66 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 2026-07-21T23:17 UTC.