Air Quality in Decatur, United States
Clear
30.2°C · 44.5% humidity
30.2°
Feels 32.5°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
AQI Forecast
27
3pm
27
27
55
6pm
47
41
35
9pm
32
30
29
12am
28
27
26
3am
26
26
26
6am
25
25
25
9am
25
25
25
12pm
25
25
Air Quality Index Trend
48h · 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.
44.5%
Humidity
30.4 km/h
Wind ESE
1010.0 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
14.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Decatur?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.514.0 µg/m³
✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
Station readings (1 station within 25 km)
14.0
Median
14.0
Average
14.0
Low
14.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -6.7
What is the 7-day forecast for Decatur?
07-21
32.8° 24.7°
0.38 mm
07-22
34.3° 21.3°
2.19 mm
07-23
36.6° 22.4°
5.38 mm
07-24
30.0° 20.7°
3.38 mm
07-25
29.2° 20.2°
3.44 mm
07-26
38.2° 21.9°
7.37 mm
07-27
31.1° 19.9°
4.31 mm
Both models agree
Avg diff: 3.8°C
Where are air quality stations near Decatur?
4
united-states-of-america-atlanta-park-drive-ne
40
United Ave., Georgia, USA
76
Gwinnett Tech, Georgia, USA
95
Gwinnett Tech, Georgia, USA
What cities are near Decatur?
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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 2026-07-21T22:04 UTC.