S
M
T
W
T
F
S
26
78°
29°
27
52°
41°
28
72°
59°
29
74°
34°
30
56°
32°
1
70°
41°
2
62°
35°
3
67°
38°
4
77°
49°
5
73°
58°
6
72°
49°
7
65°
35°
8
72°
43°
9
74°
47°
10
81°
55°
11
71°
42°
12
76°
46°
13
77°
41°
14
60°
39°
15
74°
48°
16
86°
52°
17
89°
58°
18
86°
63°
19
87°
62°
20
79°
62°
21
71°
63°
22
76°
62°
23
74°
59°
24
76°
62°
25
76°
61°
26
73°
59°
27
74°
59°
28
76°
58°
29
76°
56°
30
75°
56°
31
77°
54°
1
78°
58°
2
79°
59°
3
75°
58°
4
73°
55°
5
73°
52°
6
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dewitt
Dewitt's May 2026 forecast shows daily high temperatures ranging from 71° to 87°, with overnight lows between 52° and 63°. The average high for May is 77° with an average low of 59°. 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 Dewitt. See also: June | July | August.