Air Quality in Defiance, United States
Partly Cloudy
12.2°C · 69.1% humidity
12.2°
Feels 12.2°
47
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model
Nearby Monitoring Stations
Defiance's air quality — share it
AQI Forecast
27
5pm
27
27
47
8pm
39
35
32
11pm
30
29
28
2am
27
26
26
5am
28
28
25
8am
25
24
24
11am
24
25
25
2pm
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. Current PM2.5 concentration in Defiance is 2.2× the WHO annual guideline of 5 µg/m³.
69.1%
Humidity
36.7 km/h
Wind N
1025.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
11.2 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Defiance?
Temperature & Precipitation
PM2.511.2 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Defiance?
05-29
26.3° 6.5°
05-30
21.3° 13.1°
1.69 mm
05-31
28.1° 12.0°
06-01
28.9° 15.3°
0.06 mm
06-02
19.6° 11.8°
1.75 mm
06-03
25.8° 22.4°
1.13 mm
06-04
25.1° 13.9°
Both models agree
Avg diff: 4.2°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 2026-05-29T00:10 UTC.