S
M
T
W
T
F
S
26
55°
37°
27
54°
36°
28
56°
36°
29
55°
37°
30
56°
39°
1
62°
42°
2
57°
41°
3
56°
39°
4
56°
38°
5
58°
39°
6
66°
46°
7
70°
41°
8
59°
41°
9
60°
44°
10
59°
43°
11
61°
53°
12
69°
47°
13
62°
46°
14
60°
44°
15
60°
44°
16
62°
45°
17
69°
55°
18
67°
57°
19
71°
52°
20
65°
48°
21
66°
53°
22
70°
52°
23
72°
56°
24
75°
58°
25
75°
59°
26
77°
60°
27
78°
58°
28
79°
57°
29
75°
56°
30
78°
52°
31
74°
51°
1
69°
49°
2
70°
49°
3
70°
52°
4
72°
60°
5
75°
61°
6
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mahtomedi
Mahtomedi's May 2026 forecast shows daily high temperatures ranging from 54° to 81°, with overnight lows between 36° and 61°. The average high for May is 66° 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 Mahtomedi. See also: June | July | August.