Air Quality in Boulder, United States

Windy
15.3°C · 46.9% humidity
15.3°
Feels 15.3°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
172 5pm
172
99
99 8pm
99
99
112 11pm
112
124
124 2am
137
137
137 5am
137
137
124 8am
124
112
112 11am
112
112
112 2pm
112
112
Station readings
172
172
CAMS model adj +87
12
12
12
12
12
12
25
25
37
37
50
50
50
50
50
37
37
25
25
25
25
25
25
25
AD 728×90

PM2.5 Trend (24h)

25h · 37 stations
46.9%
Humidity
49.8 km/h
Wind E
1007.1 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Boulder?

Temperature & Precipitation

PM2.55.68 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (1 station within 25 km)
5.68
Median
5.68
Average
5.68
Low
5.68
High
PM2.5 µg/m³ · Model: 4.4 · Bias: -1.3

What is the 7-day forecast for Boulder?

04-09
17.8° 5.7°
1.31 mm
04-10
12.5° 7.2°
6.94 mm
04-11
15.8° 4.8°
3.94 mm
04-12
16.2° 3.8°
1.88 mm
04-13
12.8° 3.3°
0.75 mm
04-14
9.4° -0.3°
7.88 mm
04-15
9.7° 1.2°
0.13 mm
Both models agree Avg diff: 5.0°C

Where are air quality stations near Boulder?

–
united-states-of-america-boulder-joslyn-court
2.5 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³
23
Longmont Collocation 1
22.0 km PM2.5: 5.6 µg/m³
38
Fremont Elementary School
25.3 km PM2.5: 9.1 µg/m³
30
Northwest Open Space
25.8 km PM2.5: 7.2 µg/m³
165
Recreation Center, Senior Center, and Theatre
26.7 km PM2.5: 82.9 µg/m³
25
North Mor Elementary School
28.8 km PM2.5: 6.1 µg/m³
21
North Star
29.5 km PM2.5: 5.1 µg/m³

What cities are near Boulder?

27 Louisville 28 Broomfield 25 Erie 23 Longmont 27 Northglenn 28 Arvada 30 Golden 27 Thornton 28 Sherrelwood 28 Wheat Ridge

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T20:19 UTC.