What is the air quality in Thornton today?

The current Air Quality Index (AQI) in Thornton is 42 (Good). PM2.5 concentration is 10.0 µg/m³.

What is the temperature in Thornton right now?

The current temperature in Thornton is 20.1°C (feels like 20.1°C). Humidity is 11.1% and wind speed is 25.0 km/h.

Is it safe to go outside in Thornton?

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

Air Quality in Thornton, United States

Clear

20.1°C · 11.1% humidity

20.1°

Feels 20.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

37 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings 17h ago

AQI 1

PM2.5 0.3 µg/m³ · 17h ago

Air Quality Index Trend

9h · 1 stn

View full history →

Thornton's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

11.1%

Humidity

25.0 km/h

Wind SSE

1021.4 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

10.0 µg/m³

PM10

41.2 µg/m³

050100150200300500

What is the weather forecast for Thornton?

Temperature & Precipitation

PM2.5 Trend

9h · 1 station

PM2.510.0 µg/m³ ✓ WHO

Good

PM1041.2 µg/m³

Good

UV INDEX0.0

Low

Station readings (37 stations within 25 km)

10.0

Median

9.67

Average

4.16

Low

18.3

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +3.5

What is the 7-day forecast for Thornton?

10-20

23.4° 8.9°

10-21

22.7° 6.6°

10-22

14.1° 7.9°

10-23

13.2° 0.0°

4.19 mm

10-24

20.5° 12.6°

10-25

16.7° 7.6°

0.5 mm

10-26

23.0° 7.3°

Both models agree Avg diff: 3.9°C

Where are air quality stations near Thornton?

Thornton Community Park

0.9 km PM2.5: 9.4 µg/m³

North Star

2.3 km PM2.5: 8.6 µg/m³

Rotella Park

3.0 km PM2.5: 11.8 µg/m³

Welby, Colorado, USA

3.8 km PM2.5: 18.3 µg/m³

Welby, Colorado, USA

3.8 km PM2.5: 13.5 µg/m³

Welby, Colorado, USA

3.8 km PM2.5: 4.8 µg/m³

Northwest Open Space

4.5 km PM2.5: 12.4 µg/m³

Recreation Center, Senior Center, and Theatre

4.9 km PM2.5: 12.8 µg/m³

Adams County Health Department, Sheriff's Substation

5.2 km PM2.5: 5.1 µg/m³

Adams Birch Street

5.4 km PM2.5: 12.0 µg/m³ PM10: 67.0 µg/m³

What cities are near Thornton?

45 Northglenn 44 Sherrelwood 55 Commerce City 44 Broomfield 40 Arvada 43 Denver 38 Wheat Ridge 40 Louisville 38 Erie 31 Golden

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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 2026-10-20T20:05 UTC.