S
M
T
W
T
F
S
26
79°
55°
27
82°
57°
28
63°
50°
29
61°
45°
30
63°
43°
1
63°
43°
2
63°
41°
3
79°
43°
4
79°
61°
5
61°
45°
6
61°
45°
7
66°
37°
8
77°
52°
9
81°
50°
10
68°
48°
11
73°
43°
12
77°
54°
13
73°
57°
14
77°
52°
15
82°
59°
16
86°
66°
17
81°
64°
18
84°
72°
19
72°
55°
20
59°
54°
21
72°
55°
22
N/A
23
76°
58°
24
80°
60°
25
80°
61°
26
73°
64°
27
80°
62°
28
78°
60°
29
78°
61°
30
76°
56°
31
76°
58°
1
80°
62°
2
79°
61°
3
80°
60°
4
81°
59°
5
82°
64°
6
79°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Opal
Opal's May 2026 forecast shows daily high temperatures ranging from 73° to 82°, with overnight lows between 56° and 64°. The average high for May is 79° 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 Opal. See also: June | July | August.