What is the air quality in Princeton today?

The current Air Quality Index (AQI) in Princeton is 28 (Good). PM2.5 concentration is 6.62 µg/m³.

What is the temperature in Princeton right now?

The current temperature in Princeton is 8.4°C (feels like 5.3°C). Humidity is 87.8% and wind speed is 21.3 km/h.

Is it safe to go outside in Princeton?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Princeton, United States

Drizzle

8.4°C · 87.8% humidity

8.4°

Feels 5.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

6 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

45h · 85 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.

87.8%

Humidity

21.3 km/h

Wind ENE

1028.8 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.62 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Princeton?

Temperature & Precipitation

PM2.5 Trend

45h · 85 stations

PM2.56.62 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (6 stations within 25 km)

6.62

Median

6.52

Average

5.8

Low

7.2

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -0.6

What is the 7-day forecast for Princeton?

10-21

20.9° 5.5°

0.5 mm

10-22

19.5° 8.5°

3.62 mm

10-23

15.9° 5.1°

10-24

15.1° 7.0°

10-25

18.4° 5.9°

0.19 mm

10-26

14.0° 9.2°

0.69 mm

10-27

10.9° 4.3°

7.88 mm

Both models agree Avg diff: 3.8°C

Where are air quality stations near Princeton?

Rider University, NewJersey, USA

10.2 km PM2.5: 8.2 µg/m³

Rider University, NewJersey, USA

10.2 km PM2.5: 7.2 µg/m³

Rider University, NewJersey, USA

10.2 km PM2.5: 10.8 µg/m³

Flemington, NewJersey, USA

22.3 km PM2.5: 7.2 µg/m³

Flemington, NewJersey, USA

22.3 km PM2.5: 5.3 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 6.7 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 7.7 µg/m³

Rutgers University, NewJersey, USA

23.2 km PM2.5: 5.8 µg/m³

What cities are near Princeton?

28 Mercerville-Hamilton Square 27 Hillsborough 28 Ewing 27 Trenton 26 North Brunswick 26 Somerset 26 East Brunswick 26 New Brunswick 26 South River 27 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 2026-10-21T00:32 UTC.