S
M
T
W
T
F
S
26
67°
49°
27
68°
54°
28
68°
57°
29
69°
58°
30
70°
59°
1
77°
60°
2
79°
59°
3
79°
58°
4
71°
51°
5
68°
49°
6
70°
54°
7
72°
59°
8
79°
60°
9
80°
59°
10
74°
60°
11
77°
62°
12
81°
63°
13
81°
64°
14
80°
62°
15
75°
56°
16
74°
63°
17
75°
64°
18
75°
65°
19
76°
64°
20
76°
60°
21
77°
58°
22
78°
59°
23
80°
62°
24
81°
64°
25
84°
62°
26
84°
64°
27
85°
65°
28
86°
63°
29
88°
66°
30
89°
63°
31
88°
68°
1
88°
63°
2
81°
61°
3
81°
61°
4
79°
62°
5
80°
68°
6
88°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Norman
Norman's May 2026 forecast shows daily high temperatures ranging from 67° to 89°, with overnight lows between 49° and 70°. The average high for May is 78° 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 Norman. See also: June | July | August.