What is the air quality in Princeton today?

The current Air Quality Index (AQI) in Princeton is 32 (Good). PM2.5 concentration is 7.84 µg/m³.

What is the temperature in Princeton right now?

The current temperature in Princeton is 31.9°C (feels like 35.5°C). Humidity is 48.4% and wind speed is 47.1 km/h.

Is it safe to go outside in Princeton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 12.9 (Extreme).

Air Quality in Princeton, United States

Windy

31.9°C · 48.4% humidity

31.9°

Feels 35.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

25 10am

32 1pm

27 4pm

26 7pm

25 10pm

24 1am

24 4am

25 7am

Air Quality Index Trend

45h · 83 stn

View full history →

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.

48.4%

Humidity

47.1 km/h

Wind WNW

1015.5 hPa

Pressure

12.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.84 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Princeton?

Temperature & Precipitation

PM2.5 Trend

45h · 83 stations

PM2.57.84 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX12.9

Extreme

Station readings (4 stations within 25 km)

7.84

Median

7.2

Average

5.5

Low

9.1

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -1.8

What is the 7-day forecast for Princeton?

09-05

31.9° 14.2°

0.06 mm

09-06

22.4° 18.7°

8.94 mm

09-07

22.5° 16.7°

09-08

23.5° 15.3°

0.62 mm

09-09

27.3° 13.1°

09-10

26.3° 14.6°

8.19 mm

09-11

31.8° 11.2°

Both models agree Avg diff: 4.9°C

Where are air quality stations near Princeton?

Rider University, NewJersey, USA

10.2 km PM2.5: 7.2 µg/m³

Rider University, NewJersey, USA

10.2 km PM2.5: 7.7 µg/m³

Rider University, NewJersey, USA

10.2 km PM2.5: 9.1 µg/m³

Rider University, NewJersey, USA

10.2 km PM2.5: 7.7 µg/m³

Flemington, NewJersey, USA

22.3 km PM2.5: 9.1 µg/m³

Flemington, NewJersey, USA

22.3 km PM2.5: 7.0 µg/m³

Flemington, NewJersey, USA

22.3 km PM2.5: 5.3 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 6.0 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 5.5 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 4.3 µg/m³

What cities are near Princeton?

34 Mercerville-Hamilton Square 29 Hillsborough 33 Ewing 33 Trenton 23 North Brunswick 23 Somerset 23 East Brunswick 23 New Brunswick 23 South River 23 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 2026-09-05T17:25 UTC.