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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Recommended for South Dakota

  • Kids stay & eat for free at Marriot Bonvoy
  • Destinations include Europe, Middle East & Africa
  • Valid for up to 2 adults & 2 kids aged up to 12

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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