Air Quality in Princeton, United States

Clear
27.6°C · 32.2% humidity
27.6°
Feels 27.6°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
34 12am
34
34
62 3am
54
48
64 6am
61
39
31 9am
30
29
28 12pm
28
28
35 3pm
27
27
27 6pm
27
34
34 9pm
27
34
AD 728×90

Air Quality Index Trend

45h · 80 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. Current PM2.5 concentration in Princeton is 1.2× the WHO 24-hour guideline of 15 µg/m³.

32.2%
Humidity
28.8 km/h
Wind WNW
1011.2 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
62
17.45 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Princeton?

Temperature & Precipitation

PM2.5 Trend

45h · 80 stations
PM2.517.45 µg/m³ ×1.2 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (3 stations within 25 km)
17.45
Median
15.63
Average
13.1
Low
18.8
High
PM2.5 µg/m³ · Model: 12.85 · Bias: -4.6

What is the 7-day forecast for Princeton?

08-03
27.6° 20.8°
24.38 mm
08-04
37.5° 19.7°
08-05
33.7° 20.6°
0.13 mm
08-06
29.5° 17.7°
08-07
29.8° 20.6°
2.81 mm
08-08
37.5° 20.7°
0.44 mm
08-09
35.0° 22.6°
Both models agree Avg diff: 3.4°C

Where are air quality stations near Princeton?

8
Rider University, NewJersey, USA
10.2 km PM2.5: 1.9 µg/m³
10
Rider University, NewJersey, USA
10.2 km PM2.5: 2.4 µg/m³
52
Rider University, NewJersey, USA
10.2 km PM2.5: 12.6 µg/m³
12
Flemington, NewJersey, USA
22.3 km PM2.5: 2.9 µg/m³
12
Flemington, NewJersey, USA
22.3 km PM2.5: 2.9 µg/m³
29
Flemington, NewJersey, USA
22.3 km PM2.5: 7.0 µg/m³
57
Rutgers University, NewJersey, USA
23.2 km PM2.5: 15.0 µg/m³
16
Rutgers University, NewJersey, USA
23.2 km PM2.5: 3.8 µg/m³
13
Rutgers University, NewJersey, USA
23.2 km PM2.5: 3.1 µg/m³
38
Rutgers University, NewJersey, USA
23.2 km PM2.5: 9.1 µg/m³

What cities are near Princeton?

65 Mercerville-Hamilton Square 57 Hillsborough 65 Ewing 65 Trenton 53 North Brunswick 53 Somerset 53 East Brunswick 53 New Brunswick 53 South River 53 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 2026-08-08T07:24 UTC.