S
M
T
W
T
F
S
27
86°
59°
28
72°
55°
29
73°
55°
30
68°
55°
1
73°
52°
2
84°
46°
3
86°
50°
4
81°
50°
5
91°
52°
6
90°
61°
7
81°
52°
8
86°
55°
9
88°
54°
10
82°
55°
11
79°
59°
12
81°
54°
13
63°
50°
14
50°
43°
15
57°
39°
16
59°
36°
17
77°
36°
18
77°
45°
19
68°
43°
20
73°
45°
21
73°
50°
22
70°
54°
23
79°
52°
24
59°
41°
25
55°
37°
26
55°
41°
27
61°
39°
28
70°
37°
29
64°
36°
30
65°
41°
31
63°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Boulder
Boulder's October 2026 forecast shows daily high temperatures ranging from 63° to 65°, with overnight lows between 41° and 42°. The average high for October is 64° with an average low of 42°. 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 Boulder. See also: November | December | January.
