S
M
T
W
T
F
S
26
90°
61°
27
82°
63°
28
90°
57°
29
91°
68°
30
90°
70°
1
86°
66°
2
68°
55°
3
77°
50°
4
84°
48°
5
86°
57°
6
91°
59°
7
88°
68°
8
86°
66°
9
77°
64°
10
86°
68°
11
91°
68°
12
77°
68°
13
84°
66°
14
88°
61°
15
88°
52°
16
93°
66°
17
95°
68°
18
91°
68°
19
92°
64°
20
93°
67°
21
91°
69°
22
91°
70°
23
93°
69°
24
91°
69°
25
91°
68°
26
90°
67°
27
89°
66°
28
87°
66°
29
88°
66°
30
88°
67°
31
87°
67°
1
88°
66°
2
89°
70°
3
88°
70°
4
84°
69°
5
87°
70°
6
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in O'Brien
O'Brien's May 2026 forecast shows daily high temperatures ranging from 84° to 93°, with overnight lows between 64° and 70°. The average high for May is 89° with an average low of 68°. 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 O'Brien. See also: June | July | August.
