Weather in Bismarck in September
How warm is it in Bismarck in September?
In September the typical daytime high in Bismarck is 22.7 °C on average, from 25.9 °C at the start to 19.3 °C at the end of the month.
That is 4.8 °C cooler than in August and 8.5 °C warmer than in October.
The last 10 years were 0.3 °C warmer than more than 40 years ago.
Click a day for more: afternoon and night, the usual range, records and how fast it is warming.
The average of the weather stations Eureka (146 km) and Jamestown State Hosp (160 km); nearer ones count more.