What is the air quality in Defiance today?

The current Air Quality Index (AQI) in Defiance is 33 (Good). PM2.5 concentration is 7.95 µg/m³.

What is the temperature in Defiance right now?

The current temperature in Defiance is 25.3°C (feels like 25.3°C). Humidity is 30.0% and wind speed is 76.5 km/h.

Is it safe to go outside in Defiance?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 2.9 (Moderate).

Air Quality in Defiance, United States

Windy

25.3°C · 30.0% humidity

25.3°

Feels 25.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

25 7pm

33 10pm

28 1am

26 4am

25 7am

24 10am

24 1pm

24 4pm

View AQI history for Defiance →

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.

30.0%

Humidity

76.5 km/h

Wind N

1016.6 hPa

Pressure

2.9

UV Moderate

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.95 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Defiance?

Temperature & Precipitation

PM2.57.95 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX2.9

Moderate

What is the 7-day forecast for Defiance?

08-03

28.5° 17.8°

08-04

35.1° 17.4°

0.38 mm

08-05

35.6° 13.8°

0.19 mm

08-06

30.1° 19.9°

6.88 mm

08-07

31.5° 15.8°

08-08

34.1° 18.8°

8.75 mm

08-09

34.2° 23.0°

Both models agree Avg diff: 3.3°C

What cities are near Defiance?

56 Bowling Green 31 New Haven 52 Lima 33 Findlay 30 Fort Wayne 57 Perrysburg 46 Sylvania 30 Adrian 57 Toledo 63 Oregon

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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 2026-08-08T02:05 UTC.