S
M
T
W
T
F
S
26
69°
46°
27
64°
44°
28
56°
41°
29
55°
36°
30
52°
35°
1
66°
35°
2
65°
35°
3
71°
47°
4
64°
41°
5
52°
33°
6
47°
29°
7
58°
28°
8
71°
40°
9
62°
42°
10
61°
33°
11
69°
30°
12
71°
52°
13
72°
41°
14
80°
42°
15
89°
57°
16
81°
51°
17
74°
55°
18
70°
56°
19
60°
43°
20
59°
37°
21
64°
43°
22
66°
49°
23
68°
49°
24
82°
46°
25
85°
59°
26
88°
67°
27
89°
63°
28
83°
63°
29
N/A
30
81°
58°
31
76°
61°
1
82°
59°
2
86°
61°
3
85°
66°
4
79°
63°
5
79°
61°
6
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Dennison
Dennison's May 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 58° and 66°. The average high for May is 81° with an average low of 61°. 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 Dennison. See also: June | July | August.