Princetown weather in September 2025

Expect 77°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Princetown in September. Check more long-term weather averages for Princetown in September before you book your next holiday to New Jersey in 2025/2026.

  • 77°F maximum daytime temperature in September in Princetown77
    77°F max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Princetown8
    8 days with some rainfall
  • 54°F minimum night-time temperature in September in Princetown54
    54°F min night temperature
  • 12 hours of daylight per day in September in Princetown12
    12 hours of daylight per day
  • No heat & humidity in September in Princetown0
    No heat & humidity
  • 4.1 inches monthly rainfall in September in Princetown4.1
    4.1 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Princetown6
    6 (High) UV index

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The September weather guide for New Jersey (Princetown) 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 Princetown in September?

Daytime temperatures usually reach 77°F in Princetown in September with no heat and humidity, falling to 54°F at night.

How sunny is it in Princetown in September?

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

Does it rain in Princetown in September?

There are usually 8 days with some rain in Princetown in September and the average monthly rainfall is 4.1 inches.

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

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

Princetown September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:26 18:30
Monday, 15th September 2025 05:40 18:07
Tuesday, 30th September 2025 05:54 17:42

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