S
M
T
W
T
F
S
27
67°
51°
28
75°
49°
29
75°
44°
30
79°
49°
1
81°
50°
2
81°
52°
3
85°
52°
4
88°
55°
5
84°
55°
6
85°
55°
7
84°
51°
8
86°
55°
9
85°
53°
10
65°
50°
11
56°
42°
12
55°
39°
13
62°
37°
14
69°
38°
15
71°
39°
16
78°
46°
17
78°
51°
18
73°
44°
19
76°
42°
20
77°
52°
21
80°
52°
22
75°
48°
23
54°
36°
24
59°
42°
25
61°
43°
26
62°
42°
27
61°
41°
28
57°
43°
29
57°
43°
30
55°
40°
31
61°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Boise
Boise's October 2026 forecast shows daily high temperatures ranging from 54° to 80°, with overnight lows between 36° and 52°. The average high for October is 63° with an average low of 43°. 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 Boise. See also: November | December | January.
