Mandan September Weather

Averages and records for weather in Mandan, North Dakota in the month of September.
Typical Mandan September Weather
1991–2020
Average daily high 72.1 °F
Average daily low 45.7 °F
Average monthly precipitation 1.6 inches
Daily chance of precipitation 20.1%
Mandan September Weather Records
1913–2024
Highest temperature 104 °F September 9, 1959
Lowest temperature 14 °F September 30, 1974
Highest daily low 70 °F September 4, 2015
Lowest daily high 34 °F September 25, 1984
Hottest average high temperature 81.3 °F 1948
Coldest average high temperature 55.5 °F 1965
Most daily precipitation 3.0 inches September 18, 1977
Most monthly precipitation 5.8 inches 2019
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
September 1 78.2 51.6 103 33
September 2 77.9 51.4 100 33
September 3 77.6 51.1 101 30
September 4 77.3 50.8 100 35
September 5 76.9 50.4 102 29
September 6 76.4 50.0 103 31
September 7 75.9 49.5 104 34
September 8 75.3 49.0 96 29
September 9 74.8 48.5 104 25
September 10 74.3 48.1 98 28
September 11 73.9 47.7 101 24
September 12 73.6 47.3 96 27
September 13 73.2 46.9 93 25
September 14 72.8 46.4 94 25
September 15 72.3 45.9 98 23
September 16 71.9 45.5 103 28
September 17 71.5 45.1 95 28
September 18 71.0 44.6 97 25
September 19 70.5 44.1 94 23
September 20 69.9 43.6 93 22
September 21 69.2 43.1 94 25
September 22 68.6 42.7 94 19
September 23 68.1 42.3 90 22
September 24 67.7 41.8 93 24
September 25 67.2 41.3 91 16
September 26 66.7 40.9 90 16
September 27 66.3 40.4 95 18
September 28 65.9 40.0 96 20
September 29 65.4 39.5 88 22
September 30 64.9 39.0 88 14
Weather Station Details
Years Station Coordinates
1913–2024 Mandan Experimental Station location