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°
38°
10
64°
30°
11
84°
40°
12
76°
45°
13
81°
34°
14
80°
54°
15
77°
50°
16
65°
43°
17
48°
42°
18
44°
40°
19
58°
38°
20
69°
44°
21
67°
49°
22
60°
42°
23
66°
46°
24
79°
53°
25
86°
55°
26
82°
56°
27
78°
54°
28
79°
54°
29
80°
56°
30
77°
53°
31
77°
52°
1
72°
49°
2
69°
54°
3
70°
53°
4
73°
55°
5
74°
55°
6
66°
53°
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 60° to 86°, with overnight lows between 42° and 56°. The average high for May is 74° with an average low of 52°. 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.
