S
M
T
W
T
F
S
27
66°
55°
28
77°
56°
29
79°
54°
30
69°
64°
1
67°
52°
2
68°
45°
3
72°
44°
4
74°
47°
5
75°
44°
6
80°
50°
7
80°
52°
8
77°
54°
9
81°
59°
10
81°
54°
11
82°
61°
12
78°
53°
13
66°
51°
14
63°
56°
15
69°
45°
16
56°
39°
17
55°
38°
18
59°
41°
19
62°
42°
20
63°
43°
21
60°
37°
22
59°
43°
23
54°
38°
24
62°
42°
25
64°
41°
26
59°
39°
27
62°
33°
28
49°
30°
29
51°
40°
30
60°
38°
31
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Grinnell
Grinnell's October 2026 forecast shows daily high temperatures ranging from 49° to 82°, with overnight lows between 30° and 61°. The average high for October is 64° with an average low of 44°. 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 Grinnell. See also: November | December | January.
