Today | Weather | Monday, September 21, 2026

Weather in Trenton, New Jersey

02:56 PM
Now
Cloudy Weather
70° F
Feels Like 70°
Precipitation 13 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 63 %
Today
Partly Sunny with Showers
Day 72°
Night 55°
Precipitation 49 %
Wind 8 mph
UV Index (0 - 11+) 5

Trenton Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Cloudy Night

Day

73°

Night

50°

Wind

5 mph

Precipitation

0 %

Air Quality in Trenton

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.25 µg/m³
PM10 5.51 µg/m³
O3 0.037 ppm
NO2 3.6 ppb
SO2 0.8 ppb
CO 0.19 ppm
NH3 0.52 µg/m³
NO 0.65 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.54.25 µg/m³
PM105.51 µg/m³
O372.48 µg/m³
NO26.76 µg/m³
SO22.16 µg/m³
CO218.77 µg/m³
NH30.52 µg/m³
NO0.65 µg/m³