Jamestown weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Jamestown in September based on long-term weather averages. There is usually 11 days with some rainfall and 112 mm of average monthly rainfall in September.

  • 21°C maximum daytime temperature in September in Jamestown21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Jamestown11
    11 days with some rainfall
  • 10°C minimum night-time temperature in September in Jamestown10
    10°C min night temperature
  • 12 hours of daylight per day in September in Jamestown12
    12 hours of daylight per day
  • No heat & humidity in September in Jamestown0
    No heat & humidity
  • 112 mm monthly rainfall in September in Jamestown112
    112 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Jamestown6
    6 (High) UV index

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The September weather guide for New York (Jamestown) 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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More about New York

How hot is it in Jamestown in September?

Daytime temperatures usually reach 21°C in Jamestown in September, falling to 10°C at night.

How sunny is it in Jamestown in September?

There are normally 6 hours of bright sunshine each day in Jamestown in September - that's 51% of daylight hours.

Does it rain in Jamestown in September?

There are usually 11 days with some rain in Jamestown in September and the average monthly rainfall is 112mm.

Jamestown September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:43 18:50
Monday, 15th September 2025 05:57 18:26
Tuesday, 30th September 2025 06:13 18:00

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