Air Quality in Princeton, United States

Windy
22.9°C · 63.8% humidity
22.9°
Feels 22.9°
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
54 1pm
34
34
57 4pm
48
42
38 7pm
35
33
31 10pm
30
29
28 1am
28
28
28 4am
27
27
27 7am
27
25
25 10am
25
25
AD 728×90

Air Quality Index Trend

48h · 7 stn

Princeton's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

63.8%
Humidity
76.1 km/h
Wind NNE
1012.6 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
57
14.99 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Princeton?

Temperature & Precipitation

PM2.5 Trend

48h · 7 stations
PM2.514.99 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (3 stations within 25 km)
14.99
Median
11.87
Average
7.7
Low
17.3
High
PM2.5 µg/m³ · Model: 10.0 · Bias: -5.0

What is the 7-day forecast for Princeton?

07-21
26.3° 20.6°
0.06 mm
07-22
22.9° 14.9°
0.44 mm
07-23
29.7° 18.5°
24.31 mm
07-24
27.1° 16.4°
1.56 mm
07-25
31.1° 20.3°
4.94 mm
07-26
24.4° 18.1°
5.75 mm
07-27
26.3° 19.9°
1.94 mm
Both models agree Avg diff: 2.8°C

Where are air quality stations near Princeton?

65
Rider University, NewJersey, USA
10.2 km PM2.5: 18.8 µg/m³
59
Rider University, NewJersey, USA
10.2 km PM2.5: 15.9 µg/m³
37
Rider University, NewJersey, USA
10.2 km PM2.5: 8.9 µg/m³
61
Rider University, NewJersey, USA
10.2 km PM2.5: 16.9 µg/m³
29
Flemington, NewJersey, USA
22.3 km PM2.5: 7.0 µg/m³
17
Flemington, NewJersey, USA
22.3 km PM2.5: 4.1 µg/m³
48
Flemington, NewJersey, USA
22.3 km PM2.5: 11.5 µg/m³
54
Flemington, NewJersey, USA
22.3 km PM2.5: 13.5 µg/m³
7
Flemington, NewJersey, USA
22.3 km PM2.5: 1.7 µg/m³
92
Rutgers University, NewJersey, USA
23.2 km PM2.5: 31.6 µg/m³

What cities are near Princeton?

62 Mercerville-Hamilton Square 45 Hillsborough 60 Ewing 60 Trenton 31 North Brunswick 30 Somerset 31 East Brunswick 31 New Brunswick 31 South River 29 Old Bridge
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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 2026-07-21T20:14 UTC.