What is the air quality in Nagai today?

The current Air Quality Index (AQI) in Nagai is 68 (Moderate). PM2.5 concentration is 20.2 µg/m³.

What is the temperature in Nagai right now?

The current temperature in Nagai is 18.5°C (feels like 18.5°C). Humidity is 57.3% and wind speed is 21.1 km/h.

Air Quality in Nagai, Japan

Partly Cloudy

18.5°C · 57.3% humidity

18.5°

Feels 18.5°

Moderate

Unusually sensitive people should consider reducing prolonged outdoor exertion.

1 station

Nearby Monitoring Stations

AQI Forecast

— 2pm

—

— 5pm

—

— 8pm

—

— 11pm

—

— 2am

—

— 5am

—

— 8am

—

— 11am

—

Air Quality Index Trend

24h · 1 stn

View full history →

Nagai'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 Nagai is 1.3× the WHO 24-hour guideline of 15 µg/m³.

57.3%

Humidity

21.1 km/h

Wind ESE

1018.4 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

20.2 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Nagai?

Temperature & Precipitation

PM2.5 Trend

24h · 1 station

PM2.520.2 µg/m³ ×1.3 WHO

Moderate

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

20.2

Median

20.2

Average

20.2

Low

20.2

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -14.2

What is the 7-day forecast for Nagai?

10-21

18.5° 8.4°

10-22

19.2° 10.3°

0.69 mm

10-23

14.5° 4.9°

1.5 mm

10-24

12.9° 12.3°

6.81 mm

10-25

16.3° 7.6°

1.25 mm

10-26

15.9° 6.4°

0.19 mm

10-27

14.4° 8.2°

0.56 mm

Both models agree Avg diff: 3.7°C

Where are air quality stations near Nagai?

Koyacho, Nagai, Yamagata, Japan (長井高野長井市)

0.8 km PM2.5: 20.2 µg/m³

What cities are near Nagai?

68 Nanyō 68 Takahata 68 Kaminoyama 68 Yonezawa 22 Yamagata 19 Sagae 17 Tendō 18 Yachi 17 Higashine 38 Murakami

Get AQI alerts for Nagai

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T08:28 UTC.