S
M
T
W
T
F
S
26
63°
51°
27
71°
43°
28
64°
46°
29
69°
56°
30
73°
50°
1
70°
41°
2
63°
44°
3
67°
32°
4
79°
36°
5
82°
50°
6
73°
63°
7
65°
45°
8
72°
39°
9
77°
43°
10
85°
52°
11
62°
41°
12
72°
49°
13
76°
48°
14
66°
42°
15
74°
51°
16
89°
59°
17
86°
59°
18
87°
58°
19
88°
60°
20
80°
59°
21
79°
58°
22
78°
60°
23
81°
58°
24
81°
59°
25
79°
53°
26
80°
57°
27
80°
56°
28
81°
58°
29
81°
58°
30
80°
59°
31
82°
59°
1
82°
58°
2
81°
58°
3
80°
57°
4
79°
59°
5
82°
60°
6
81°
59°
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 66° to 89°, with overnight lows between 42° and 60°. The average high for May is 80° with an average low of 57°. 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.
