S
M
T
W
T
F
S
26
84°
63°
27
83°
64°
28
83°
64°
29
82°
63°
30
82°
64°
1
84°
65°
2
81°
64°
3
79°
65°
4
79°
64°
5
80°
63°
6
80°
65°
7
82°
65°
8
83°
66°
9
84°
65°
10
85°
66°
11
86°
66°
12
87°
67°
13
87°
67°
14
86°
66°
15
87°
65°
16
84°
63°
17
86°
66°
18
86°
67°
19
88°
63°
20
88°
64°
21
86°
63°
22
87°
64°
23
89°
65°
24
90°
67°
25
90°
69°
26
89°
67°
27
91°
67°
28
91°
68°
29
90°
68°
30
91°
70°
31
91°
71°
1
90°
67°
2
92°
66°
3
92°
71°
4
91°
71°
5
92°
70°
6
92°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Opelousas
Opelousas's May 2026 forecast shows daily high temperatures ranging from 79° to 92°, with overnight lows between 63° and 71°. The average high for May is 86° with an average low of 66°. 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 Opelousas. See also: June | July | August.