Air Quality in Defiance, United States
Windy
20.3°C · 81.0% humidity
20.3°
Feels 20.3°
14
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Defiance's air quality — share it
AQI Forecast
27
4am
27
27
14
7am
18
17
19
10am
21
22
22
1pm
23
23
23
4pm
24
24
24
7pm
24
24
24
10pm
25
25
25
1am
25
25
Defiance's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
81.0%
Humidity
53.8 km/h
Wind SSW
1011.4 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
3.33 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Defiance?
Temperature & Precipitation
PM2.53.33 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Defiance?
06-09
31.4° 9.9°
06-10
28.0° 20.7°
5.75 mm
06-11
24.3° 12.5°
06-12
29.0° 18.3°
3.88 mm
06-13
28.6° 22.5°
1.69 mm
06-14
26.5° 15.7°
06-15
32.1° 20.1°
1.06 mm
Both models agree
Avg diff: 5.0°C
What cities are near Defiance?
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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 2026-06-09T11:45 UTC.