S
M
T
W
T
F
S
27
86°
54°
28
72°
51°
29
75°
53°
30
68°
53°
1
74°
46°
2
83°
41°
3
85°
42°
4
79°
45°
5
90°
42°
6
88°
47°
7
79°
44°
8
86°
46°
9
86°
45°
10
83°
49°
11
80°
53°
12
81°
47°
13
65°
43°
14
49°
40°
15
53°
30°
16
65°
33°
17
71°
43°
18
72°
37°
19
70°
40°
20
71°
43°
21
68°
42°
22
61°
37°
23
59°
36°
24
61°
37°
25
61°
35°
26
60°
30°
27
59°
32°
28
62°
34°
29
62°
35°
30
54°
34°
31
60°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Longmont
Longmont's October 2026 forecast shows daily high temperatures ranging from 49° to 72°, with overnight lows between 30° and 43°. The average high for October is 62° with an average low of 37°. 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 Longmont. See also: November | December | January.
