S
M
T
W
T
F
S
26
80°
50°
27
82°
59°
28
68°
55°
29
64°
48°
30
66°
39°
1
63°
42°
2
61°
40°
3
73°
39°
4
84°
57°
5
64°
44°
6
65°
42°
7
73°
35°
8
79°
46°
9
84°
53°
10
76°
54°
11
81°
41°
12
82°
48°
13
77°
47°
14
78°
41°
15
85°
55°
16
85°
70°
17
88°
66°
18
85°
65°
19
83°
65°
20
66°
57°
21
72°
56°
22
64°
61°
23
74°
62°
24
79°
59°
25
82°
65°
26
73°
65°
27
81°
64°
28
81°
62°
29
77°
60°
30
74°
59°
31
76°
56°
1
74°
60°
2
73°
56°
3
79°
58°
4
78°
62°
5
81°
59°
6
82°
63°
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 73° to 82°, with overnight lows between 56° and 65°. The average high for May is 78° with an average low of 61°. 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.
