Jamestown weather in September 2025

Expect daytime maximum temperatures of 21°C in Jamestown, North Dakota in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 44 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Jamestown21
    21°C max day temperature
  • 8 hours of sunshine per day
  • 7 days with some rainfall in September in Jamestown7
    7 days with some rainfall
  • 7°C minimum night-time temperature in September in Jamestown7
    7°C min night temperature
  • 13 hours of daylight per day in September in Jamestown13
    13 hours of daylight per day
  • No heat & humidity in September in Jamestown0
    No heat & humidity
  • 44 mm monthly rainfall in September in Jamestown44
    44 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Jamestown5
    5 (Moderate) UV index

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The September weather guide for North Dakota (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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How hot is it in Jamestown in September?

Daytime temperatures usually reach 21°C in Jamestown in September, falling to 7°C at night.

How sunny is it in Jamestown in September?

There are normally 8 hours of bright sunshine each day in Jamestown in September - that's 61% of daylight hours.

Does it rain in Jamestown in September?

There are usually 7 days with some rain in Jamestown in September and the average monthly rainfall is 44mm.

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 05:55 19:14
Monday, 15th September 2025 06:13 18:46
Tuesday, 30th September 2025 06:33 18:16

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