Air Quality in Decatur, United States
Windy
20.7°C · 69.0% humidity
20.7°
Feels 20.7°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Decatur's air quality — share it
AQI Forecast
25
6pm
25
27
19
9pm
28
30
31
12am
32
32
33
3am
33
53
54
6am
54
34
34
9am
34
34
34
12pm
27
27
27
3pm
27
27
Air Quality Index Trend
40h · 2 stnDecatur's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
69.0%
Humidity
56.9 km/h
Wind WNW
1013.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.6 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Decatur?
Temperature & Precipitation
PM2.5 Trend
40h · 2 stationsPM2.54.6 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
4.6
Median
4.6
Average
4.6
Low
4.6
High
PM2.5 µg/m³ · Model: 6.25 · Bias: +1.6
What is the 7-day forecast for Decatur?
06-09
22.8° 14.6°
0.13 mm
06-10
31.4° 22.4°
0.06 mm
06-11
26.0° 20.2°
0.31 mm
06-12
32.3° 21.6°
5.0 mm
06-13
22.5° 20.3°
6.06 mm
06-14
30.0° 16.7°
1.0 mm
06-15
31.8° 21.9°
0.31 mm
Both models agree
Avg diff: 3.2°C
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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 2026-06-09T02:14 UTC.