What is the air quality in Niihama today?

The current Air Quality Index (AQI) in Niihama is 50 (Good). PM2.5 concentration is 12.03 µg/m³.

What is the temperature in Niihama right now?

The current temperature in Niihama is 19.7°C (feels like 19.7°C). Humidity is 67.9% and wind speed is 43.8 km/h.

Is it safe to go outside in Niihama?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Niihama, Japan

Drizzle

19.7°C · 67.9% humidity

19.7°

Feels 19.7°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 14 stn

View full history →

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.

67.9%

Humidity

43.8 km/h

Wind NE

1017.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

12.03 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Niihama?

Temperature & Precipitation

PM2.5 Trend

45h · 14 stations

PM2.512.03 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (5 stations within 25 km)

12.03

Median

12.42

Average

9.1

Low

17.8

High

PM2.5 µg/m³ · Model: 6.5 · Bias: -5.5

What is the 7-day forecast for Niihama?

10-21

19.7° 18.7°

4.69 mm

10-22

22.4° 20.1°

0.13 mm

10-23

19.7° 18.3°

1.88 mm

10-24

21.7° 17.6°

0.75 mm

10-25

20.5° 14.3°

1.88 mm

10-26

18.0° 14.8°

10-27

18.2° 16.3°

Both models agree Avg diff: 5.3°C

Where are air quality stations near Niihama?

Kubotacho, Niihama, Ehime, Japan (金子新居浜市)

2.3 km PM2.5: 13.1 µg/m³

Hongo, Niihama, Ehime, Japan (中村新居浜市)

3.9 km PM2.5: 9.1 µg/m³

Omachi, Saijo, Ehime, Japan (西条西条市)

11.5 km PM2.5: 9.1 µg/m³

Omachi, Saijo, Ehime, Japan (西条西条市)

11.5 km PM2.5: 10.1 µg/m³

Nyugawa, Saijo, Ehime, Japan (東予西条市)

21.0 km PM2.5: 12.0 µg/m³

Mishimamiyagawa, Shikokuchuo, Ehime, Japan (伊予三島四国中央市)

22.7 km PM2.5: 17.8 µg/m³

What cities are near Niihama?

42 Saijō 63 Shikokuchūō 66 Kawanoechō 38 Imabari 59 Kan’onjichō 12 Innoshima 39 Tōon 54 Mitoyo 38 Shinagawa 42 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 2026-10-21T05:27 UTC.