S
M
T
W
T
F
S
27
76°
54°
28
77°
52°
29
77°
52°
30
73°
51°
1
72°
42°
2
66°
44°
3
70°
47°
4
65°
40°
5
72°
40°
6
68°
38°
7
63°
36°
8
61°
37°
9
60°
34°
10
69°
38°
11
72°
43°
12
72°
43°
13
71°
42°
14
71°
39°
15
59°
40°
16
62°
32°
17
55°
31°
18
62°
37°
19
68°
40°
20
66°
32°
21
52°
29°
22
54°
28°
23
55°
29°
24
55°
29°
25
54°
28°
26
53°
29°
27
53°
29°
28
55°
30°
29
62°
34°
30
58°
32°
31
55°
32°
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 52° to 77°, with overnight lows between 28° and 54°. The average high for October is 64° with an average low of 38°. 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.
