Air Quality in Boulder, United States
Windy
32.0°C · 21.3% humidity
32.0°
Feels 32.0°
31
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Boulder's air quality — share it
AQI Forecast
34
2pm
27
27
31
5pm
27
27
34
8pm
34
34
34
11pm
34
34
34
2am
27
27
27
5am
27
27
27
8am
27
27
27
11am
27
27
Air Quality Index Trend
46h · 35 stnBoulder's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
21.3%
Humidity
44.9 km/h
Wind E
1010.0 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.35 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Boulder?
Temperature & Precipitation
PM2.5 Trend
46h · 35 stationsPM2.57.35 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX12.9
Extreme
What is the 7-day forecast for Boulder?
08-03
32.0° 18.3°
1.88 mm
08-04
32.9° 17.2°
0.19 mm
08-05
34.2° 15.9°
4.06 mm
08-06
32.1° 15.3°
0.38 mm
08-07
34.2° 18.2°
0.06 mm
08-08
34.5° 17.9°
08-09
32.2° 18.7°
2.44 mm
Both models agree
Avg diff: 3.4°C
Where are air quality stations near Boulder?
64
Longmont Collocation 1
54
Longmont - Municipal, Colorado, USA
85
Fremont Elementary School
88
Westminster Town Hall
88
Northwest Open Space
83
Recreation Center, Senior Center, and Theatre
83
North Mor Elementary School
86
Westminster MAC
What cities are near Boulder?
Get AQI alerts for Boulder
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-07T23:56 UTC.