S
M
T
W
T
F
S
26
79°
57°
27
77°
56°
28
75°
56°
29
69°
55°
30
68°
56°
1
69°
56°
2
68°
57°
3
70°
56°
4
71°
57°
5
74°
58°
6
74°
58°
7
75°
59°
8
77°
60°
9
75°
60°
10
74°
59°
11
74°
60°
12
76°
60°
13
80°
61°
14
79°
60°
15
76°
59°
16
76°
58°
17
79°
58°
18
82°
57°
19
80°
55°
20
78°
56°
21
77°
57°
22
76°
63°
23
83°
62°
24
85°
64°
25
85°
65°
26
84°
65°
27
86°
64°
28
87°
65°
29
86°
64°
30
87°
58°
31
85°
62°
1
82°
65°
2
88°
66°
3
88°
66°
4
89°
67°
5
90°
59°
6
89°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Okmulgee
Okmulgee's May 2026 forecast shows daily high temperatures ranging from 68° to 90°, with overnight lows between 55° and 67°. The average high for May is 79° with an average low of 60°. 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 Okmulgee. See also: June | July | August.