S
M
T
W
T
F
S
26
84°
68°
27
85°
73°
28
84°
73°
29
86°
71°
30
77°
70°
1
73°
59°
2
73°
57°
3
75°
55°
4
77°
57°
5
83°
63°
6
86°
74°
7
78°
69°
8
79°
68°
9
75°
66°
10
83°
67°
11
78°
69°
12
83°
69°
13
84°
70°
14
87°
68°
15
87°
70°
16
84°
71°
17
86°
73°
18
89°
75°
19
87°
77°
20
87°
72°
21
80°
73°
22
89°
72°
23
77°
69°
24
79°
69°
25
77°
71°
26
85°
68°
27
85°
74°
28
82°
72°
29
86°
74°
30
87°
75°
31
89°
74°
1
93°
73°
2
87°
74°
3
86°
72°
4
87°
73°
5
88°
73°
6
88°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harahan
Harahan's May 2026 forecast shows daily high temperatures ranging from 82° to 93°, with overnight lows between 72° and 75°. The average high for May is 87° with an average low of 73°. 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 Harahan. See also: June | July | August.