S
M
T
W
T
F
S
26
85°
72°
27
93°
75°
28
84°
70°
29
68°
60°
30
65°
59°
1
67°
57°
2
78°
54°
3
80°
59°
4
80°
64°
5
90°
62°
6
62°
54°
7
72°
53°
8
76°
63°
9
91°
70°
10
77°
64°
11
77°
59°
12
85°
63°
13
90°
64°
14
90°
70°
15
88°
70°
16
90°
74°
17
88°
77°
18
89°
76°
19
83°
66°
20
77°
63°
21
80°
65°
22
79°
66°
23
81°
67°
24
84°
68°
25
83°
68°
26
84°
70°
27
85°
69°
28
86°
70°
29
87°
68°
30
83°
71°
31
85°
72°
1
85°
72°
2
86°
71°
3
84°
68°
4
83°
65°
5
84°
67°
6
84°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Addison
Addison's May 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 63° and 77°. The average high for May is 84° with an average low of 69°. 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 Addison. See also: June | July | August.