S
M
T
W
T
F
S
26
59°
43°
27
66°
45°
28
65°
41°
29
64°
45°
30
66°
46°
1
65°
41°
2
66°
46°
3
68°
48°
4
69°
49°
5
68°
48°
6
70°
50°
7
69°
51°
8
70°
49°
9
66°
44°
10
64°
49°
11
62°
50°
12
70°
50°
13
68°
48°
14
68°
51°
15
72°
52°
16
73°
54°
17
72°
54°
18
74°
43°
19
67°
43°
20
66°
44°
21
67°
45°
22
66°
47°
23
64°
48°
24
63°
51°
25
69°
56°
26
74°
54°
27
76°
55°
28
68°
57°
29
75°
52°
30
76°
48°
31
70°
54°
1
77°
51°
2
79°
58°
3
82°
56°
4
80°
49°
5
72°
47°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waconia
Waconia's May 2026 forecast shows daily high temperatures ranging from 59° to 82°, with overnight lows between 41° and 58°. The average high for May is 69° with an average low of 49°. 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 Waconia. See also: June | July | August.