Air Quality in Louisville, United States

Clear
33.4°C · 13.8% humidity
33.4°
Feels 33.4°
59
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
20 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
58 11am
42
23
59 2pm
52
47
43 5pm
41
39
37 8pm
36
36
35 11pm
35
37
36 2am
34
34
34 5am
34
36
36 8am
36
34
Station readings
58
42
23
CAMS model adj +9
25
25
25
25
25
25
25
25
25
25
25
25
25
25
27
27
25
25
25
25
27
27
27
25
AD 728×90

Air Quality Index Trend

17h · 2 stn

Louisville'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 Louisville is 1.0× the WHO 24-hour guideline of 15 µg/m³.

13.8%
Humidity
36.8 km/h
Wind E
1009.8 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
59
15.67 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Louisville?

Temperature & Precipitation

PM2.5 Trend

17h · 2 stations
PM2.515.67 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (20 stations within 25 km)
15.67
Median
15.84
Average
5.65
Low
21.1
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -9.7

What is the 7-day forecast for Louisville?

07-21
33.4° 17.8°
0.06 mm
07-22
35.1° 15.6°
07-23
23.9° 16.2°
1.56 mm
07-24
32.1° 17.3°
1.63 mm
07-25
35.0° 17.0°
0.75 mm
07-26
31.4° 17.9°
1.0 mm
07-27
34.0° 16.0°
Both models agree Avg diff: 4.7°C

Where are air quality stations near Louisville?

–
Rocky Flats - North
8.7 km
30
Athens, Boulder-CU, Colorado, USA
12.2 km PM2.5: 7.2 µg/m³
27
united-states-of-america-boulder-joslyn-court
13.7 km PM2.5: 6.5 µg/m³ PM10: 6.9 µg/m³
67
Northwest Open Space
13.8 km PM2.5: 19.9 µg/m³
60
Recreation Center, Senior Center, and Theatre
14.4 km PM2.5: 16.4 µg/m³
66
Westminster Town Hall
14.7 km PM2.5: 19.0 µg/m³
67
Silver Creek
15.2 km PM2.5: 19.7 µg/m³
63
North Mor Elementary School
17.0 km PM2.5: 17.8 µg/m³
52
North Star
18.0 km PM2.5: 12.5 µg/m³
58
Trail Winds Recreation Center
18.1 km PM2.5: 15.5 µg/m³

What cities are near Louisville?

60 Broomfield 60 Erie 50 Boulder 59 Northglenn 55 Thornton 59 Sherrelwood 59 Arvada 62 Longmont 59 Wheat Ridge 65 Commerce City
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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 2026-07-21T20:18 UTC.