S
M
T
W
T
F
S
27
70°
49°
28
73°
50°
29
76°
48°
30
70°
47°
1
76°
41°
2
66°
43°
3
72°
46°
4
76°
46°
5
75°
45°
6
75°
35°
7
64°
35°
8
64°
36°
9
65°
34°
10
69°
31°
11
61°
32°
12
59°
34°
13
64°
37°
14
66°
34°
15
68°
39°
16
62°
43°
17
66°
33°
18
64°
36°
19
63°
41°
20
69°
40°
21
68°
42°
22
69°
35°
23
61°
33°
24
57°
33°
25
58°
32°
26
Hist. Avg.
62°
34°
27
Hist. Avg.
62°
34°
28
Hist. Avg.
61°
34°
29
Hist. Avg.
61°
33°
30
Hist. Avg.
61°
33°
31
Hist. Avg.
60°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Boulder
Boulder's October 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 31° and 50°. The average high for October is 67° with an average low of 39°. 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.
