Trenton weather in September 2026

Expect daytime maximum temperatures of 79°F in Trenton, New Jersey in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 4.0 inches of rainfall in the month.

  • 79°F maximum daytime temperature in September in Trenton79
    79°F max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Trenton8
    8 days with some rainfall
  • 55°F minimum night-time temperature in September in Trenton55
    55°F 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
  • 4.0 inches monthly rainfall in September in Trenton4.0
    4.0 inches 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)  |  Imperial (°F)

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How hot is it in Trenton in September?

Daytime temperatures usually reach 79°F in Trenton in September with no heat and humidity, falling to 55°F 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 4.0 inches.

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 2026. Select a month to view Trenton sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 05:27 18:31
Tuesday, 15th September 2026 05:40 18:08
Wednesday, 30th September 2026 05:54 17:43

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