S
M
T
W
T
F
S
27
76°
43°
28
69°
46°
29
69°
37°
30
74°
38°
1
74°
41°
2
81°
37°
3
79°
38°
4
83°
37°
5
85°
42°
6
81°
40°
7
79°
38°
8
79°
38°
9
83°
51°
10
68°
47°
11
54°
41°
12
53°
38°
13
63°
42°
14
59°
36°
15
57°
33°
16
58°
31°
17
58°
36°
18
59°
35°
19
63°
33°
20
60°
36°
21
46°
18°
22
61°
35°
23
58°
30°
24
59°
31°
25
57°
30°
26
58°
29°
27
58°
30°
28
57°
28°
29
55°
28°
30
56°
32°
31
54°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Idaho Falls
Idaho Falls's October 2026 forecast shows daily high temperatures ranging from 46° to 83°, with overnight lows between 18° and 51°. The average high for October is 60° with an average low of 34°. 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 Idaho Falls. See also: November | December | January.
