Air Quality in Smithtown, United States
Drizzle
19.8°C · 83.4% humidity
19.8°
Feels 19.8°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Smithtown's air quality — share it
AQI Forecast
34
7pm
27
25
30
10pm
28
27
26
1am
26
26
26
4am
25
25
24
7am
24
24
24
10am
24
24
24
1pm
24
24
24
4pm
24
24
Air Quality Index Trend
43h · 1 stnSmithtown's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
83.4%
Humidity
50.3 km/h
Wind S
1011.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.1 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Smithtown?
Temperature & Precipitation
PM2.5 Trend
43h · 1 stationPM2.57.1 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Smithtown?
05-30
19.8° 11.7°
2.69 mm
05-31
23.0° 13.0°
06-01
18.7° 14.3°
0.5 mm
06-02
19.2° 16.2°
06-03
18.9° 16.4°
0.25 mm
06-04
18.8° 17.2°
1.12 mm
06-05
20.8° 15.5°
0.38 mm
Both models agree
Avg diff: 3.1°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-30T02:29 UTC.