S
M
T
W
T
F
S
26
63°
51°
27
71°
43°
28
64°
46°
29
69°
56°
30
73°
50°
1
68°
49°
2
61°
40°
3
67°
42°
4
73°
53°
5
82°
59°
6
77°
54°
7
69°
37°
8
61°
36°
9
65°
40°
10
71°
51°
11
73°
52°
12
71°
53°
13
72°
52°
14
71°
49°
15
70°
54°
16
70°
53°
17
71°
54°
18
73°
55°
19
78°
55°
20
78°
54°
21
79°
56°
22
79°
57°
23
80°
57°
24
80°
56°
25
79°
57°
26
76°
56°
27
79°
57°
28
80°
58°
29
79°
58°
30
80°
57°
31
80°
58°
1
81°
58°
2
78°
59°
3
82°
53°
4
73°
54°
5
73°
53°
6
74°
53°
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 61° to 82°, with overnight lows between 36° and 59°. The average high for May is 74° with an average low of 53°. 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.
