S
M
T
W
T
F
S
27
80°
47°
28
78°
46°
29
76°
45°
30
78°
44°
1
76°
45°
2
70°
42°
3
74°
41°
4
75°
41°
5
75°
37°
6
68°
32°
7
62°
30°
8
65°
32°
9
76°
41°
10
76°
35°
11
66°
40°
12
71°
35°
13
72°
37°
14
69°
39°
15
68°
38°
16
73°
40°
17
73°
42°
18
75°
35°
19
71°
34°
20
64°
34°
21
66°
27°
22
59°
25°
23
54°
29°
24
54°
25°
25
57°
25°
26
58°
21°
27
53°
20°
28
55°
20°
29
53°
21°
30
55°
27°
31
63°
22°
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 53° to 80°, with overnight lows between 20° and 47°. The average high for October is 67° with an average low of 34°. 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.
