S
M
T
W
T
F
S
26
61°
51°
27
72°
42°
28
65°
46°
29
68°
57°
30
75°
49°
1
71°
38°
2
64°
49°
3
66°
37°
4
80°
45°
5
85°
56°
6
74°
62°
7
69°
46°
8
74°
40°
9
80°
44°
10
87°
49°
11
65°
41°
12
75°
37°
13
80°
48°
14
67°
44°
15
77°
40°
16
87°
60°
17
94°
65°
18
95°
64°
19
97°
66°
20
95°
64°
21
71°
53°
22
62°
53°
23
70°
57°
24
76°
60°
25
76°
59°
26
80°
60°
27
79°
61°
28
80°
60°
29
81°
57°
30
83°
62°
31
82°
61°
1
82°
63°
2
79°
63°
3
78°
62°
4
78°
62°
5
79°
59°
6
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cullen
Cullen's May 2026 forecast shows daily high temperatures ranging from 62° to 97°, with overnight lows between 53° 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 Cullen. See also: June | July | August.