S
M
T
W
T
F
S
26
59°
40°
27
58°
47°
28
61°
42°
29
50°
33°
30
47°
30°
1
49°
29°
2
54°
39°
3
65°
40°
4
62°
43°
5
58°
39°
6
59°
40°
7
58°
41°
8
57°
41°
9
59°
40°
10
65°
42°
11
58°
43°
12
58°
42°
13
59°
38°
14
58°
38°
15
60°
44°
16
64°
44°
17
64°
48°
18
71°
50°
19
68°
45°
20
62°
44°
21
62°
42°
22
63°
42°
23
67°
52°
24
73°
53°
25
73°
52°
26
68°
49°
27
67°
51°
28
71°
53°
29
74°
54°
30
75°
54°
31
73°
55°
1
76°
56°
2
77°
57°
3
77°
56°
4
74°
51°
5
67°
51°
6
68°
56°
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 47° to 77°, with overnight lows between 29° and 57°. The average high for May is 64° 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.
