S
M
T
W
T
F
S
26
67°
46°
27
55°
43°
28
57°
41°
29
51°
35°
30
46°
30°
1
52°
31°
2
62°
28°
3
70°
47°
4
62°
39°
5
48°
34°
6
43°
32°
7
56°
34°
8
67°
30°
9
58°
40°
10
57°
33°
11
63°
29°
12
72°
46°
13
69°
45°
14
74°
40°
15
85°
50°
16
77°
49°
17
60°
49°
18
67°
52°
19
61°
44°
20
59°
40°
21
65°
42°
22
65°
49°
23
68°
42°
24
78°
55°
25
81°
59°
26
89°
62°
27
86°
55°
28
83°
54°
29
81°
55°
30
78°
54°
31
73°
55°
1
78°
54°
2
75°
54°
3
76°
56°
4
75°
56°
5
74°
52°
6
69°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oak Grove
Oak Grove's May 2026 forecast shows daily high temperatures ranging from 68° to 89°, with overnight lows between 42° and 62°. The average high for May is 78° with an average low of 55°. 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 Oak Grove. See also: June | July | August.