S
M
T
W
T
F
S
26
90°
63°
27
88°
63°
28
90°
59°
29
91°
66°
30
88°
70°
1
77°
61°
2
72°
57°
3
77°
46°
4
82°
51°
5
83°
60°
6
88°
68°
7
87°
68°
8
77°
60°
9
81°
61°
10
87°
67°
11
82°
62°
12
84°
64°
13
87°
64°
14
86°
61°
15
87°
65°
16
85°
62°
17
88°
63°
18
83°
65°
19
86°
66°
20
85°
67°
21
82°
66°
22
84°
61°
23
82°
60°
24
83°
61°
25
84°
63°
26
82°
63°
27
83°
62°
28
84°
63°
29
85°
66°
30
86°
68°
31
85°
69°
1
86°
69°
2
87°
68°
3
85°
69°
4
86°
69°
5
86°
68°
6
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gretna
Gretna's May 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 51° and 70°. The average high for May is 85° with an average low of 64°. 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 Gretna. See also: June | July | August.
