Jamestown weather in September 2025

Expect 70°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Jamestown in September. Check more long-term weather averages for Jamestown in September before you book your next holiday to New York in 2025/2026.

  • 70°F maximum daytime temperature in September in Jamestown70
    70°F max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Jamestown11
    11 days with some rainfall
  • 50°F minimum night-time temperature in September in Jamestown50
    50°F 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
  • 4.4 inches monthly rainfall in September in Jamestown4.4
    4.4 inches 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)  |  Imperial (°F)

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More about New York

How hot is it in Jamestown in September?

Daytime temperatures usually reach 70°F in Jamestown in September, falling to 50°F 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 4.4 inches.

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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