S
M
T
W
T
F
S
26
83°
65°
27
92°
73°
28
84°
64°
29
64°
57°
30
66°
54°
1
67°
54°
2
75°
49°
3
82°
53°
4
82°
61°
5
86°
55°
6
63°
51°
7
73°
49°
8
80°
55°
9
87°
66°
10
74°
59°
11
75°
56°
12
82°
56°
13
88°
61°
14
89°
64°
15
88°
70°
16
86°
71°
17
87°
74°
18
88°
77°
19
79°
63°
20
78°
60°
21
72°
64°
22
82°
66°
23
82°
64°
24
84°
65°
25
86°
66°
26
83°
67°
27
73°
66°
28
85°
65°
29
89°
69°
30
89°
71°
31
94°
72°
1
95°
70°
2
93°
68°
3
88°
68°
4
87°
71°
5
84°
71°
6
85°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Denison
Denison's May 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 68° and 72°. The average high for May is 89° with an average low of 70°. 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.
