S
M
T
W
T
F
S
26
75°
48°
27
64°
57°
28
63°
53°
29
63°
41°
30
63°
37°
1
56°
42°
2
56°
39°
3
64°
39°
4
76°
50°
5
56°
47°
6
60°
39°
7
63°
37°
8
66°
45°
9
76°
51°
10
69°
48°
11
70°
44°
12
82°
43°
13
68°
42°
14
69°
38°
15
72°
50°
16
75°
64°
17
86°
64°
18
81°
64°
19
82°
61°
20
70°
51°
21
69°
48°
22
72°
54°
23
80°
58°
24
75°
57°
25
82°
51°
26
79°
62°
27
84°
59°
28
83°
56°
29
80°
56°
30
79°
54°
31
77°
52°
1
81°
54°
2
81°
54°
3
76°
55°
4
77°
57°
5
83°
62°
6
84°
65°
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 76° to 84°, with overnight lows between 52° and 65°. The average high for May is 80° with an average low of 57°. 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.
