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
77°
51°
15
77°
42°
16
74°
43°
17
52°
38°
18
47°
35°
19
53°
35°
20
65°
42°
21
70°
45°
22
76°
49°
23
73°
51°
24
71°
50°
25
70°
46°
26
74°
49°
27
70°
47°
28
64°
49°
29
63°
46°
30
65°
45°
31
65°
47°
1
66°
53°
2
71°
55°
3
76°
55°
4
76°
57°
5
77°
55°
6
71°
54°
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 47° to 77°, with overnight lows between 35° and 57°. The average high for May is 68° with an average low of 47°. 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.
