S
M
T
W
T
F
S
26
59°
40°
27
60°
44°
28
61°
47°
29
47°
36°
30
48°
32°
1
44°
31°
2
58°
29°
3
70°
41°
4
76°
42°
5
54°
35°
6
53°
34°
7
53°
33°
8
64°
44°
9
64°
34°
10
54°
34°
11
55°
37°
12
55°
40°
13
60°
42°
14
64°
45°
15
68°
45°
16
65°
44°
17
63°
46°
18
65°
45°
19
67°
46°
20
62°
42°
21
61°
41°
22
61°
42°
23
62°
44°
24
63°
45°
25
64°
48°
26
65°
46°
27
69°
47°
28
70°
51°
29
73°
52°
30
74°
54°
31
75°
54°
1
72°
52°
2
71°
55°
3
75°
57°
4
76°
56°
5
77°
54°
6
67°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brillion
Brillion's May 2026 forecast shows daily high temperatures ranging from 53° to 77°, with overnight lows between 33° and 57°. The average high for May is 65° with an average low of 46°. 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 Brillion. See also: June | July | August.
