S
M
T
W
T
F
S
26
51°
34°
27
52°
35°
28
54°
44°
29
58°
46°
30
64°
46°
1
62°
43°
2
54°
41°
3
54°
40°
4
55°
38°
5
54°
44°
6
56°
47°
7
59°
48°
8
65°
44°
9
56°
40°
10
58°
48°
11
59°
46°
12
62°
47°
13
61°
48°
14
60°
48°
15
63°
51°
16
70°
51°
17
69°
49°
18
61°
47°
19
61°
49°
20
64°
52°
21
65°
53°
22
65°
44°
23
68°
48°
24
70°
46°
25
71°
47°
26
72°
54°
27
75°
53°
28
76°
56°
29
77°
51°
30
77°
52°
31
75°
55°
1
78°
52°
2
76°
48°
3
71°
58°
4
77°
60°
5
80°
60°
6
81°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fond du Lac
Fond du Lac's May 2026 forecast shows daily high temperatures ranging from 51° to 81°, with overnight lows between 34° and 62°. The average high for May is 65° with an average low of 48°. 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 Fond du Lac. See also: June | July | August.
