S
M
T
W
T
F
S
26
85°
72°
27
93°
75°
28
84°
70°
29
68°
60°
30
N/A
1
62°
53°
2
73°
56°
3
79°
60°
4
83°
69°
5
83°
58°
6
80°
57°
7
77°
59°
8
80°
62°
9
77°
63°
10
82°
65°
11
87°
66°
12
82°
65°
13
82°
63°
14
83°
61°
15
86°
68°
16
86°
68°
17
85°
67°
18
85°
69°
19
86°
69°
20
87°
68°
21
82°
69°
22
80°
66°
23
80°
67°
24
86°
70°
25
83°
67°
26
81°
63°
27
80°
63°
28
82°
68°
29
84°
69°
30
87°
70°
31
88°
71°
1
90°
70°
2
90°
72°
3
91°
73°
4
91°
72°
5
90°
71°
6
88°
68°
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 62° to 91°, with overnight lows between 53° and 73°. The average high for May is 83° with an average low of 66°. 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.