S
M
T
W
T
F
S
26
70°
46°
27
62°
47°
28
54°
43°
29
61°
38°
30
57°
38°
1
58°
37°
2
67°
32°
3
74°
50°
4
80°
46°
5
58°
47°
6
60°
37°
7
71°
42°
8
78°
50°
9
76°
44°
10
73°
43°
11
83°
52°
12
80°
58°
13
78°
49°
14
82°
56°
15
92°
56°
16
86°
64°
17
84°
61°
18
65°
52°
19
60°
46°
20
59°
41°
21
62°
48°
22
72°
55°
23
75°
53°
24
83°
61°
25
85°
63°
26
85°
62°
27
80°
63°
28
77°
63°
29
78°
59°
30
76°
60°
31
78°
56°
1
78°
56°
2
83°
59°
3
81°
60°
4
84°
62°
5
80°
61°
6
80°
64°
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 75° to 85°, with overnight lows between 53° and 64°. The average high for May is 80° with an average low of 60°. 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.
