S
M
T
W
T
F
S
26
70°
45°
27
63°
45°
28
55°
39°
29
59°
37°
30
55°
36°
1
55°
34°
2
64°
28°
3
73°
45°
4
77°
43°
5
57°
39°
6
57°
30°
7
68°
41°
8
75°
37°
9
68°
37°
10
70°
32°
11
81°
41°
12
79°
48°
13
77°
39°
14
79°
54°
15
90°
54°
16
81°
54°
17
81°
61°
18
64°
52°
19
N/A
20
60°
48°
21
64°
50°
22
61°
50°
23
71°
49°
24
75°
56°
25
81°
57°
26
79°
58°
27
78°
59°
28
76°
60°
29
76°
60°
30
78°
59°
31
79°
58°
1
76°
55°
2
75°
60°
3
71°
56°
4
72°
57°
5
77°
61°
6
77°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Denison
Denison's May 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 48° and 61°. The average high for May is 74° with an average low of 56°. 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 Denison. See also: June | July | August.
