What is the air quality in Thornton today?

The current Air Quality Index (AQI) in Thornton is 22 (Good). PM2.5 concentration is 5.19 µg/m³.

What is the temperature in Thornton right now?

The current temperature in Thornton is 29.8°C (feels like 29.8°C). Humidity is 20.8% and wind speed is 85.0 km/h.

Is it safe to go outside in Thornton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 7.9 (Very High).

Air Quality in Thornton, United States

Rain

29.8°C · 20.8% humidity

29.8°

Feels 29.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

29 stations

Nearby Monitoring Stations

AQI Forecast

25 12pm

22 3pm

25 6pm

27 9pm

34 12am

25 3am

25 6am

25 9am

Air Quality Index Trend

47h · 5 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. Current PM2.5 concentration in Thornton is 1.0× the WHO annual guideline of 5 µg/m³.

20.8%

Humidity

85.0 km/h

Wind NW

1012.5 hPa

Pressure

7.9

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

5.19 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Thornton?

Temperature & Precipitation

PM2.5 Trend

47h · 5 stations

PM2.55.19 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX7.9

Very High

Station readings (29 stations within 25 km)

5.19

Median

5.44

Average

4.0

Low

7.21

High

PM2.5 µg/m³ · Model: 7.1 · Bias: +1.9

What is the 7-day forecast for Thornton?

05-28

29.9° 11.0°

0.94 mm

05-29

30.2° 14.6°

14.44 mm

05-30

29.9° 13.8°

0.62 mm

05-31

29.6° 15.6°

0.88 mm

06-01

28.2° 15.0°

06-02

35.6° 17.4°

06-03

35.5° 16.0°

Both models agree Avg diff: 4.6°C

Where are air quality stations near Thornton?

Thornton Community Park

0.9 km PM2.5: 4.7 µg/m³

North Mor Elementary School

1.6 km PM2.5: 6.2 µg/m³

North Star

2.3 km PM2.5: 4.8 µg/m³

Rotella Park

3.0 km PM2.5: 5.8 µg/m³

Welby, Colorado, USA

3.8 km PM2.5: 5.8 µg/m³

Northwest Open Space

4.5 km PM2.5: 7.1 µg/m³

Adams County Health Department, Sheriff's Substation

5.2 km PM2.5: 4.2 µg/m³

Adams Birch Street

5.4 km PM2.5: 4.0 µg/m³ PM10: 24.0 µg/m³

Westminster Town Hall

6.5 km PM2.5: 7.1 µg/m³

Anythink Commerce City

6.8 km PM2.5: 5.2 µg/m³

What cities are near Thornton?

25 Northglenn 23 Sherrelwood 23 Commerce City 25 Broomfield 23 Arvada 22 Denver 23 Wheat Ridge 23 Louisville 24 Erie 28 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 2026-05-28T21:46 UTC.