Air Quality in Highlands Ranch, United States

Clear
35.1°C · 13.3% humidity
35.1°
Feels 35.1°
67
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
16 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
21 8am
21
21
67 11am
54
45
38 2pm
33
30
27 5pm
25
24
23 8pm
23
24
24 11pm
24
30
30 2am
23
23
23 5am
23
23
Station readings
5
25
12
CAMS model adj -4
25
25
25
25
25
25
25
25
25
25
25
25
25
25
27
27
27
34
34
27
27
27
27
27
AD 728×90

Air Quality Index Trend

12h · 1 stn

Highlands Ranch'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 Highlands Ranch is 1.3× the WHO 24-hour guideline of 15 µg/m³.

13.3%
Humidity
9.0 km/h
Wind NNW
1009.5 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
67
19.93 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Highlands Ranch?

Temperature & Precipitation

PM2.5 Trend

12h · 1 station
PM2.519.93 µg/m³ ×1.3 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX24.9
Extreme
AD 300×250
Station readings (16 stations within 25 km)
19.93
Median
18.3
Average
3.39
Low
22.22
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -13.9

What is the 7-day forecast for Highlands Ranch?

07-21
35.1° 22.9°
07-22
37.0° 21.5°
07-23
25.0° 18.4°
1.13 mm
07-24
35.8° 22.9°
0.06 mm
07-25
35.4° 21.5°
3.31 mm
07-26
32.4° 22.3°
6.31 mm
07-27
36.7° 21.5°
Both models agree Avg diff: 4.2°C

Where are air quality stations near Highlands Ranch?

69
Runyon Elementary School
4.3 km PM2.5: 20.7 µg/m³
61
Arapahoe Community College
7.1 km PM2.5: 17.0 µg/m³ PM10: 38.0 µg/m³
68
South Bannock Street
7.3 km PM2.5: 20.1 µg/m³
72
Broken Tee Golf Course
10.6 km PM2.5: 22.2 µg/m³
67
Sheridan Library
11.2 km PM2.5: 19.7 µg/m³
66
Sheridan Square Park
11.8 km PM2.5: 19.2 µg/m³
65
Cushing Park
12.0 km PM2.5: 18.9 µg/m³
68
Northwest Greenbelt
13.4 km PM2.5: 20.4 µg/m³
71
May Library
16.6 km PM2.5: 21.5 µg/m³
70
Smoky Hill Library
17.3 km PM2.5: 21.3 µg/m³

What cities are near Highlands Ranch?

68 Southglenn 67 Castlewood 67 Greenwood Village 68 Littleton 68 Centennial 66 Columbine 65 Ken Caryl 63 Dakota Ridge 70 Parker 60 Denver
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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 2026-07-21T17:14 UTC.