Air Quality in Thornton, United States

Clear
35.6°C · 13.3% humidity
35.6°
Feels 35.6°
56
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
37 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
14 11am
14
14
56 2pm
44
36
29 5pm
25
22
20 8pm
18
19
25 11pm
24
24
24 2am
24
16
16 5am
16
43
43 8am
23
23
Station readings
14
20
6
CAMS model adj -11
25
25
25
25
25
25
25
25
25
25
25
27
34
34
34
34
34
27
27
27
54
54
34
34
AD 728×90

Air Quality Index Trend

15h · 1 stn

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.

13.3%
Humidity
13.4 km/h
Wind S
1008.8 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
56
14.63 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Thornton?

Temperature & Precipitation

PM2.5 Trend

15h · 1 station
PM2.514.63 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX29.9
Extreme
AD 300×250
Station readings (37 stations within 25 km)
14.63
Median
16.62
Average
3.22
Low
21.1
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -8.4

What is the 7-day forecast for Thornton?

07-21
35.6° 19.7°
0.19 mm
07-22
37.2° 19.8°
07-23
27.4° 19.6°
0.19 mm
07-24
35.7° 19.3°
0.25 mm
07-25
36.4° 18.4°
2.38 mm
07-26
32.3° 20.4°
2.19 mm
07-27
37.4° 18.0°
Both models agree Avg diff: 3.7°C

Where are air quality stations near Thornton?

50
Thornton Community Park
0.9 km PM2.5: 12.0 µg/m³
63
North Mor Elementary School
1.6 km PM2.5: 17.8 µg/m³
52
North Star
2.3 km PM2.5: 12.5 µg/m³
62
Rotella Park
3.0 km PM2.5: 17.1 µg/m³
60
Welby, Colorado, USA
3.8 km PM2.5: 16.4 µg/m³
67
Northwest Open Space
4.5 km PM2.5: 19.9 µg/m³
60
Recreation Center, Senior Center, and Theatre
4.9 km PM2.5: 16.4 µg/m³
24
Adams County Health Department, Sheriff's Substation
5.2 km PM2.5: 5.7 µg/m³
66
Adams Birch Street
5.4 km PM2.5: 19.0 µg/m³ PM10: 75.0 µg/m³
64
Westminster MAC
6.4 km PM2.5: 18.2 µg/m³

What cities are near Thornton?

62 Northglenn 60 Sherrelwood 66 Commerce City 62 Broomfield 59 Arvada 60 Denver 60 Wheat Ridge 60 Louisville 62 Erie 60 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 2026-07-21T20:01 UTC.