S
M
T
W
T
F
S
27
66°
54°
28
61°
54°
29
60°
53°
30
64°
55°
1
68°
53°
2
72°
51°
3
59°
38°
4
66°
35°
5
62°
46°
6
59°
33°
7
64°
32°
8
65°
51°
9
60°
43°
10
56°
48°
11
67°
55°
12
64°
53°
13
60°
41°
14
51°
39°
15
50°
41°
16
55°
45°
17
53°
44°
18
51°
42°
19
52°
41°
20
57°
42°
21
56°
39°
22
52°
41°
23
50°
35°
24
48°
34°
25
53°
44°
26
59°
39°
27
54°
32°
28
46°
33°
29
46°
34°
30
50°
40°
31
52°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Grand Isle
Grand Isle's October 2026 forecast shows daily high temperatures ranging from 46° to 67°, with overnight lows between 32° and 55°. The average high for October is 54° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Grand Isle. See also: November | December | January.
