S
M
T
W
T
F
S
26
61°
44°
27
67°
42°
28
63°
47°
29
54°
44°
30
55°
40°
1
50°
34°
2
50°
34°
3
57°
45°
4
69°
53°
5
58°
42°
6
55°
37°
7
51°
32°
8
57°
40°
9
60°
41°
10
62°
41°
11
63°
44°
12
65°
45°
13
64°
44°
14
62°
46°
15
65°
43°
16
64°
41°
17
65°
50°
18
72°
52°
19
72°
52°
20
73°
51°
21
75°
53°
22
74°
53°
23
76°
48°
24
67°
45°
25
67°
48°
26
68°
54°
27
76°
54°
28
72°
53°
29
70°
50°
30
71°
49°
31
72°
46°
1
69°
50°
2
69°
53°
3
70°
47°
4
70°
47°
5
71°
48°
6
71°
48°
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 50° to 76°, with overnight lows between 32° and 54°. The average high for May is 66° with an average low of 46°. 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.