S
M
T
W
T
F
S
26
58°
42°
27
69°
45°
28
65°
51°
29
54°
36°
30
52°
32°
1
48°
30°
2
57°
28°
3
68°
45°
4
80°
43°
5
58°
40°
6
55°
31°
7
61°
29°
8
69°
29°
9
72°
44°
10
64°
31°
11
56°
35°
12
73°
34°
13
63°
36°
14
70°
33°
15
74°
60°
16
83°
59°
17
81°
64°
18
78°
65°
19
74°
46°
20
65°
46°
21
67°
48°
22
72°
53°
23
79°
55°
24
74°
59°
25
75°
58°
26
74°
59°
27
75°
59°
28
76°
52°
29
71°
56°
30
70°
54°
31
70°
51°
1
71°
49°
2
70°
49°
3
70°
51°
4
73°
59°
5
81°
61°
6
82°
61°
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 65° to 83°, with overnight lows between 46° and 65°. The average high for May is 74° with an average low of 55°. 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.
