S
M
T
W
T
F
S
26
81°
58°
27
86°
63°
28
72°
57°
29
70°
52°
30
65°
44°
1
67°
45°
2
68°
43°
3
78°
39°
4
81°
58°
5
66°
46°
6
61°
45°
7
68°
40°
8
77°
46°
9
83°
53°
10
73°
54°
11
76°
48°
12
79°
48°
13
79°
57°
14
78°
48°
15
80°
56°
16
85°
67°
17
86°
70°
18
81°
71°
19
78°
60°
20
64°
55°
21
70°
55°
22
74°
58°
23
78°
62°
24
79°
61°
25
80°
62°
26
83°
65°
27
81°
64°
28
80°
62°
29
79°
58°
30
79°
63°
31
83°
62°
1
83°
64°
2
82°
63°
3
79°
61°
4
76°
58°
5
81°
63°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Tecumseh
Tecumseh's May 2026 forecast shows daily high temperatures ranging from 64° to 86°, with overnight lows between 55° and 71°. The average high for May is 79° with an average low of 62°. 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 Tecumseh. See also: June | July | August.