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
75°
42°
13
81°
57°
14
81°
48°
15
78°
44°
16
74°
46°
17
56°
38°
18
51°
38°
19
62°
41°
20
66°
43°
21
67°
45°
22
68°
49°
23
67°
48°
24
71°
49°
25
70°
46°
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 51° to 81°, with overnight lows between 38° and 57°. The average high for May is 68° with an average low of 48°. 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.
