Air Quality in Princeton, United States
Rain
26.9°C · 65.7% humidity
26.9°
Feels 26.9°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Princeton's air quality — share it
AQI Forecast
25
5pm
25
25
25
8pm
25
25
25
11pm
25
25
25
2am
25
25
25
5am
25
25
25
8am
25
25
25
11am
25
25
25
2pm
25
25
Air Quality Index Trend
45h · 1 stnPrinceton'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 Princeton is 1.2× the WHO annual guideline of 5 µg/m³.
65.7%
Humidity
83.3 km/h
Wind SE
1013.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Princeton?
Temperature & Precipitation
PM2.5 Trend
45h · 1 stationPM2.56.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
What is the 7-day forecast for Princeton?
05-29
30.3° 26.2°
8.0 mm
05-30
34.0° 24.8°
05-31
31.0° 24.0°
4.69 mm
06-01
30.6° 25.3°
8.06 mm
06-02
31.5° 25.4°
1.69 mm
06-03
28.5° 26.2°
0.06 mm
06-04
27.6° 25.2°
17.75 mm
Both models agree
Avg diff: 1.7°C
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:11 UTC.