S
M
T
W
T
F
S
26
78°
62°
27
78°
60°
28
79°
58°
29
74°
60°
30
76°
61°
1
75°
58°
2
78°
59°
3
74°
55°
4
74°
55°
5
75°
56°
6
74°
55°
7
75°
57°
8
77°
63°
9
82°
64°
10
83°
64°
11
80°
63°
12
77°
58°
13
75°
57°
14
76°
59°
15
79°
65°
16
80°
61°
17
79°
65°
18
83°
66°
19
80°
66°
20
79°
65°
21
80°
67°
22
82°
67°
23
85°
68°
24
86°
68°
25
86°
69°
26
85°
69°
27
87°
68°
28
86°
68°
29
87°
69°
30
88°
69°
31
87°
68°
1
88°
65°
2
86°
66°
3
83°
68°
4
83°
68°
5
84°
70°
6
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Green Bay
Green Bay's May 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 55° and 70°. The average high for May is 81° with an average low of 64°. 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 Green Bay. See also: June | July | August.
