Bismarck weather in September 2026

Expect daytime maximum temperatures of 70°F in Bismarck, North Dakota in September based on long-term weather averages. There are 8 hours of sunshine per day on average.

  • 70°F maximum daytime temperature in September in Bismarck70
    70°F max day temperature
  • 8 hours of sunshine per day
  • 7 days with some rainfall in September in Bismarck7
    7 days with some rainfall
  • 43°F minimum night-time temperature in September in Bismarck43
    43°F min night temperature
  • 13 hours of daylight per day in September in Bismarck13
    13 hours of daylight per day
  • No heat & humidity in September in Bismarck0
    No heat & humidity
  • 1.5 inches monthly rainfall in September in Bismarck1.5
    1.5 inches of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Bismarck5
    5 (Moderate) UV index

More about Bismarck

Bismarck by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for North Dakota

  • Browse the best deals on hotel stays & compare prices
  • Check lowest rates by month & also by day of the week
  • Search by date or browse hotels by destination & map

The September weather guide for North Dakota (Bismarck) 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)

Back to top

More about the USA

How hot is it in Bismarck in September?

Daytime temperatures usually reach 70°F in Bismarck in September, falling to 43°F at night.

How sunny is it in Bismarck in September?

There are normally 8 hours of bright sunshine each day in Bismarck in September - that's 65% of daylight hours.

Does it rain in Bismarck in September?

There are usually 7 days with some rain in Bismarck in September and the average monthly rainfall is 1.5 inches.

Bismarck September sunrise & sunset times

Browse the sunrise and sunset times for Bismarck in September 2026. Select a month to view Bismarck sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st September 2026 06:03 19:22
Tuesday, 15th September 2026 06:21 18:55
Wednesday, 30th September 2026 06:41 18:25

Related posts

Popular travel offers

Explore holiday destinations

More holidays

Save with latest deals & discounts

More deals

Airport parking

More parking

Airport lounges

More lounges

Top ^