Trenton weather in September 2025

Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Trenton in September. Check more long-term weather averages for Trenton in September before you book your next holiday to New Jersey in 2025/2026.

  • 26°C maximum daytime temperature in September in Trenton26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Trenton8
    8 days with some rainfall
  • 13°C minimum night-time temperature in September in Trenton13
    13°C min night temperature
  • 12 hours of daylight per day in September in Trenton12
    12 hours of daylight per day
  • No heat & humidity in September in Trenton0
    No heat & humidity
  • 101 mm monthly rainfall in September in Trenton101
    101 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Trenton6
    6 (High) UV index

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The September weather guide for New Jersey (Trenton) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Trenton in September?

Daytime temperatures usually reach 26°C in Trenton in September with no heat and humidity, falling to 13°C at night.

How sunny is it in Trenton in September?

There are normally 7 hours of bright sunshine each day in Trenton in September - that's 58% of daylight hours.

Does it rain in Trenton in September?

There are usually 8 days with some rain in Trenton in September and the average monthly rainfall is 101mm.

What is the chance of a hurricane in Trenton in September?

On average less than 1 day in September in Trenton is likely to be affected by the passage of one or more tropical storms.

Trenton September sunrise & sunset times

Browse the sunrise and sunset times for Trenton in September 2025. Select a month to view Trenton sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:27 18:30
Monday, 15th September 2025 05:40 18:07
Tuesday, 30th September 2025 05:55 17:42

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