S
M
T
W
T
F
S
26
90°
63°
27
88°
63°
28
85°
62°
29
84°
61°
30
87°
63°
31
89°
63°
1
89°
62°
2
83°
63°
3
82°
59°
4
84°
62°
5
89°
62°
6
82°
61°
7
82°
56°
8
87°
59°
9
87°
60°
10
90°
61°
11
90°
53°
12
85°
55°
13
83°
58°
14
88°
60°
15
90°
58°
16
90°
56°
17
89°
52°
18
82°
51°
19
80°
52°
20
81°
55°
21
85°
56°
22
88°
56°
23
82°
58°
24
86°
57°
25
81°
55°
26
79°
54°
27
79°
54°
28
80°
57°
29
85°
58°
30
87°
55°
31
86°
50°
1
80°
54°
2
79°
53°
3
78°
52°
4
79°
50°
5
77°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Collins
Fort Collins's August 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 49° and 63°. The average high for August is 84° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fort Collins. See also: September | October | November.
