Air Quality in Decatur, United States
Windy
25.5°C · 74.7% humidity
25.5°
Feels 25.5°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Decatur's air quality — share it
AQI Forecast
34
5pm
34
34
36
8pm
54
34
34
11pm
34
34
34
2am
34
34
34
5am
34
34
54
8am
54
54
54
11am
54
34
34
2pm
27
27
Air Quality Index Trend
25h · 1 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.
74.7%
Humidity
47.0 km/h
Wind E
1010.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.6 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Decatur?
Temperature & Precipitation
PM2.5 Trend
25h · 1 stationPM2.58.6 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (1 station within 25 km)
8.6
Median
8.6
Average
8.6
Low
8.6
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -1.2
What is the 7-day forecast for Decatur?
07-22
28.9° 21.4°
0.06 mm
07-23
29.8° 19.4°
0.81 mm
07-24
27.4° 19.9°
0.44 mm
07-25
27.1° 20.1°
4.44 mm
07-26
30.9° 21.0°
2.12 mm
07-27
27.2° 20.2°
7.06 mm
07-28
29.6° 22.0°
8.75 mm
Both models agree
Avg diff: 4.3°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 2026-07-22T01:07 UTC.