S
M
T
W
T
F
S
26
64°
52°
27
71°
46°
28
73°
42°
29
73°
53°
30
76°
55°
1
69°
43°
2
62°
50°
3
66°
44°
4
82°
44°
5
85°
56°
6
76°
63°
7
68°
47°
8
73°
46°
9
79°
50°
10
88°
57°
11
69°
40°
12
76°
38°
13
80°
46°
14
71°
51°
15
76°
46°
16
89°
55°
17
96°
65°
18
98°
69°
19
98°
69°
20
98°
69°
21
93°
60°
22
64°
57°
23
63°
56°
24
77°
68°
25
77°
70°
26
78°
69°
27
84°
68°
28
85°
62°
29
79°
60°
30
73°
55°
31
71°
54°
1
73°
57°
2
79°
57°
3
80°
59°
4
79°
61°
5
80°
63°
6
83°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Octagon
Octagon's May 2026 forecast shows daily high temperatures ranging from 71° to 85°, with overnight lows between 54° and 70°. The average high for May is 78° with an average low of 62°. 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 Octagon. See also: June | July | August.