Air Quality in Decatur, United States
Clear
33.0°C · 49.3% humidity
33.0°
Feels 37.2°
46
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Decatur's air quality — share it
AQI Forecast
25
10am
25
25
46
1pm
40
36
33
4pm
31
29
28
7pm
29
35
35
10pm
35
35
34
1am
34
34
34
4am
34
54
54
7am
27
27
Air Quality Index Trend
37h · 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.
49.3%
Humidity
36.2 km/h
Wind WNW
1018.0 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
11.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Decatur?
Temperature & Precipitation
PM2.5 Trend
37h · 2 stationsPM2.511.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX19.9
Extreme
Station readings (1 station within 25 km)
11.0
Median
11.0
Average
11.0
Low
11.0
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -4.8
What is the 7-day forecast for Decatur?
09-05
33.0° 25.2°
09-06
31.1° 22.9°
2.87 mm
09-07
24.9° 21.0°
9.94 mm
09-08
28.2° 17.7°
0.19 mm
09-09
32.4° 16.7°
1.69 mm
09-10
35.7° 17.8°
1.63 mm
09-11
35.6° 21.7°
1.19 mm
Both models agree
Avg diff: 4.0°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 2026-09-05T18:55 UTC.