S
M
T
W
T
F
S
26
59°
22°
27
51°
35°
28
53°
23°
29
56°
26°
30
51°
30°
1
65°
21°
2
74°
41°
3
77°
34°
4
52°
36°
5
47°
30°
6
54°
23°
7
65°
22°
8
72°
35°
9
62°
31°
10
65°
39°
11
81°
46°
12
74°
40°
13
78°
49°
14
81°
49°
15
82°
46°
16
73°
49°
17
70°
44°
18
71°
51°
19
75°
51°
20
77°
48°
21
75°
49°
22
69°
45°
23
68°
51°
24
71°
52°
25
72°
51°
26
63°
51°
27
64°
52°
28
67°
50°
29
63°
45°
30
65°
45°
31
66°
53°
1
67°
53°
2
65°
54°
3
66°
51°
4
72°
54°
5
72°
55°
6
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bismarck
Bismarck's May 2026 forecast shows daily high temperatures ranging from 62° to 82°, with overnight lows between 31° and 56°. The average high for May is 71° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Bismarck. See also: June | July | August.
