S
M
T
W
T
F
S
31
83°
54°
1
81°
52°
2
82°
54°
3
80°
53°
4
74°
55°
5
83°
55°
6
83°
53°
7
79°
51°
8
74°
53°
9
75°
53°
10
75°
52°
11
81°
50°
12
81°
44°
13
74°
44°
14
75°
49°
15
79°
50°
16
82°
52°
17
83°
55°
18
81°
54°
19
76°
56°
20
88°
56°
21
86°
52°
22
82°
53°
23
83°
56°
24
88°
60°
25
87°
59°
26
89°
58°
27
88°
61°
28
90°
61°
29
89°
56°
30
85°
59°
1
82°
60°
2
87°
58°
3
92°
61°
4
91°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Fort Collins
Fort Collins's June 2026 forecast shows daily high temperatures ranging from 74° to 92°, with overnight lows between 44° and 61°. The average high for June is 83° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Fort Collins. See also: July | August | September.