Air Quality in Louisville, United States

Cloudy
10.3°C · 88.6% humidity
10.3°
Feels 10.3°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
15 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
22 5am
22
22
36 8am
32
29
27 11am
26
25
24 2pm
23
23
23 5pm
22
22
22 8pm
24
24
24 11pm
31
24
24 2am
24
24
Station readings
23
28
35
CAMS model adj -3
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
27
27
27
34
27
27
27
27
AD 728×90

Air Quality Index Trend

15h · 1 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 1.7× the WHO annual guideline of 5 µg/m³.

88.6%
Humidity
28.0 km/h
Wind WNW
1018.1 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
36
8.67 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Louisville?

Temperature & Precipitation

PM2.5 Trend

15h · 1 station
PM2.58.67 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (15 stations within 25 km)
8.67
Median
8.3
Average
3.78
Low
13.73
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -2.4

What is the 7-day forecast for Louisville?

05-29
27.5° 10.3°
5.38 mm
05-30
27.2° 11.4°
1.31 mm
05-31
28.2° 12.9°
2.12 mm
06-01
24.6° 11.9°
0.31 mm
06-02
31.9° 15.8°
06-03
32.9° 13.7°
06-04
30.8° 10.1°
10.25 mm
Both models agree Avg diff: 4.3°C

Where are air quality stations near Louisville?

31
Athens, Boulder-CU, Colorado, USA
12.2 km PM2.5: 7.4 µg/m³
–
united-states-of-america-boulder-joslyn-court
13.7 km
16
Northwest Open Space
13.8 km PM2.5: 3.8 µg/m³
44
Westminster Town Hall
14.7 km PM2.5: 10.5 µg/m³
54
Silver Creek
15.2 km PM2.5: 13.7 µg/m³
39
North Mor Elementary School
17.0 km PM2.5: 9.3 µg/m³
25
North Star
18.0 km PM2.5: 6.0 µg/m³
37
Trail Winds Recreation Center
18.1 km PM2.5: 8.8 µg/m³
34
Fremont Elementary School
18.3 km PM2.5: 8.2 µg/m³
26
Thornton Community Park
18.9 km PM2.5: 6.2 µg/m³

What cities are near Louisville?

35 Broomfield 41 Erie 32 Boulder 34 Northglenn 29 Thornton 30 Sherrelwood 30 Arvada 41 Longmont 29 Wheat Ridge 32 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 2026-05-29T14:30 UTC.