S
M
T
W
T
F
S
26
68°
52°
27
62°
46°
28
54°
42°
29
61°
39°
30
60°
40°
1
61°
35°
2
66°
49°
3
78°
47°
4
80°
45°
5
62°
42°
6
59°
38°
7
69°
46°
8
78°
49°
9
75°
48°
10
71°
50°
11
74°
51°
12
71°
50°
13
73°
50°
14
70°
49°
15
66°
51°
16
67°
55°
17
71°
55°
18
73°
56°
19
74°
57°
20
78°
57°
21
77°
56°
22
75°
50°
23
69°
50°
24
67°
51°
25
68°
51°
26
70°
50°
27
69°
52°
28
71°
51°
29
72°
56°
30
78°
61°
31
75°
61°
1
82°
62°
2
81°
62°
3
81°
61°
4
75°
58°
5
75°
54°
6
74°
55°
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 59° to 82°, with overnight lows between 35° and 62°. The average high for May is 72° with an average low of 52°. 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.