S
M
T
W
T
F
S
26
88°
65°
27
88°
72°
28
89°
72°
29
85°
67°
30
69°
61°
1
61°
51°
2
74°
49°
3
80°
45°
4
79°
48°
5
81°
61°
6
81°
58°
7
72°
56°
8
71°
60°
9
73°
64°
10
87°
67°
11
75°
66°
12
84°
59°
13
87°
54°
14
90°
64°
15
88°
68°
16
84°
66°
17
85°
73°
18
88°
74°
19
88°
73°
20
84°
69°
21
82°
68°
22
84°
67°
23
83°
69°
24
85°
68°
25
86°
69°
26
85°
70°
27
88°
67°
28
88°
71°
29
88°
70°
30
86°
70°
31
83°
69°
1
84°
70°
2
85°
71°
3
87°
71°
4
88°
70°
5
88°
72°
6
85°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oklahoma
Oklahoma's May 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 64° and 74°. The average high for May is 86° with an average low of 70°. 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 Oklahoma. See also: June | July | August.
