Deadwood weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Deadwood in September. Check more long-term weather averages for Deadwood in September before you book your next holiday to South Dakota in 2025/2026.

  • 22°C maximum daytime temperature in September in Deadwood22
    22°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Deadwood8
    8 days with some rainfall
  • 6°C minimum night-time temperature in September in Deadwood6
    6°C min night temperature
  • 12 hours of daylight per day in September in Deadwood12
    12 hours of daylight per day
  • No heat & humidity in September in Deadwood0
    No heat & humidity
  • 31 mm monthly rainfall in September in Deadwood31
    31 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Deadwood6
    6 (High) UV index

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The September weather guide for South Dakota (Deadwood) 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 Deadwood in September?

Daytime temperatures usually reach 22°C in Deadwood in September, falling to 6°C at night.

How sunny is it in Deadwood in September?

There are normally 8 hours of bright sunshine each day in Deadwood in September - that's 67% of daylight hours.

Does it rain in Deadwood in September?

There are usually 8 days with some rain in Deadwood in September and the average monthly rainfall is 31mm.

Deadwood September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:18 18:31
Monday, 15th September 2025 05:34 18:05
Tuesday, 30th September 2025 05:52 17:37

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