What is the air quality in Defiance today?

The current Air Quality Index (AQI) in Defiance is 22 (Good). PM2.5 concentration is 5.32 µg/m³.

What is the temperature in Defiance right now?

The current temperature in Defiance is 10.3°C (feels like 10.3°C). Humidity is 53.3% and wind speed is 46.8 km/h.

Is it safe to go outside in Defiance?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Defiance, United States

Windy

10.3°C · 53.3% humidity

10.3°

Feels 10.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

Calibrated model

Nearby Monitoring Stations

AQI Forecast

— 4pm

—

— 7pm

—

— 10pm

—

— 1am

—

— 4am

—

— 7am

—

— 10am

—

— 1pm

—

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.

53.3%

Humidity

46.8 km/h

Wind ENE

1025.5 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

5.32 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Defiance?

Temperature & Precipitation

PM2.55.32 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

What is the 7-day forecast for Defiance?

10-20

9.9° 5.2°

3.13 mm

10-21

21.8° 8.6°

10-22

18.5° 6.1°

0.19 mm

10-23

18.0° 4.7°

0.63 mm

10-24

20.8° 7.6°

10-25

12.7° 3.8°

10-26

13.0° 6.7°

0.94 mm

Both models agree Avg diff: 4.0°C

What cities are near Defiance?

22 Bowling Green 17 New Haven 43 Lima 15 Findlay 17 Fort Wayne 38 Perrysburg 38 Sylvania 23 Adrian 38 Toledo 38 Oregon

Get AQI alerts for Defiance

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T23:40 UTC.