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Bismarck, ND

78°F
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Bismarck

North Dakota

78°
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Bismarck, ND Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

September

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
30
85°
60°
31
Sunshine; breezy in the p.m.
82°
51°
1
Sunny spells
78°
55°
2
Mostly cloudy
83°
62°
3
Very warm with clouds and sun
86°
61°
4
Mostly sunny and hot
92°
64°
5
Mostly sunny and very warm
89°
61°
6
Rain in the afternoon
78°
61°
7
Cloudy and humid
78°
60°
8
Mostly sunny and less humid
80°
53°
9
Plenty of sunshine
75°
51°
10
Partly sunny
70°
48°
11
Windy with sunny spells
73°
48°
12
Mostly cloudy and not as warm
68°
52°
13
A couple of showers
70°
54°
14
Plenty of sunshine
77°
54°
15
Plenty of sunshine
75°
53°
16
Thickening clouds
76°
54°
17
A shower in the morning
77°
53°
18
Clouds yielding to sun
75°
53°
19
Sunny to partly cloudy
75°
52°
20
Plenty of sunshine
76°
53°
21
Plenty of sunshine
75°
51°
22
Plenty of sunshine
74°
51°
23
Plenty of sunshine
74°
53°
24
Plenty of sunshine
76°
55°
25
Plenty of sunshine
76°
53°
26
Sunny
74°
51°
27
Warm with a thick cloud cover
75°
52°
28
Mostly sunny
74°
52°
29
Cloudy
73°
51°
30
Mostly cloudy
73°
52°
1
Mostly sunny
72°
50°
2
Increasing cloudiness
71°
49°
3
Cloudy
69°
49°

Temperature Graph

°F
100° 86° 72° 58° 44° Sep
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

September Weather in Bismarck

Bismarck's September 2026 forecast shows daily high temperatures ranging from 68° to 92°, with overnight lows between 48° and 64°. The average high for September is 76° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Bismarck. See also: October | November | December.

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World North America United States North Dakota Bismarck

Weather Near Bismarck:

  • Mandan, ND
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