S
M
T
W
T
F
S
26
87°
61°
27
87°
64°
28
88°
61°
29
86°
62°
30
85°
62°
1
82°
59°
2
80°
57°
3
81°
63°
4
81°
63°
5
84°
64°
6
83°
64°
7
84°
63°
8
82°
64°
9
82°
64°
10
84°
65°
11
87°
65°
12
87°
64°
13
86°
65°
14
87°
66°
15
88°
66°
16
88°
65°
17
83°
66°
18
83°
66°
19
84°
65°
20
84°
67°
21
85°
67°
22
84°
66°
23
85°
67°
24
85°
67°
25
84°
64°
26
87°
68°
27
90°
68°
28
90°
67°
29
89°
69°
30
90°
68°
31
90°
69°
1
90°
69°
2
91°
69°
3
90°
67°
4
91°
68°
5
90°
70°
6
91°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Geneva
Lake Geneva's May 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 57° and 70°. The average high for May is 86° with an average low of 65°. 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 Lake Geneva. See also: June | July | August.
