S
M
T
W
T
F
S
26
54°
35°
27
60°
35°
28
62°
37°
29
61°
36°
30
52°
38°
1
67°
29°
2
74°
34°
3
75°
42°
4
72°
43°
5
44°
32°
6
44°
31°
7
71°
30°
8
75°
44°
9
78°
47°
10
72°
43°
11
88°
46°
12
77°
54°
13
92°
46°
14
88°
58°
15
85°
50°
16
81°
56°
17
70°
44°
18
47°
39°
19
53°
37°
20
60°
42°
21
66°
42°
22
64°
44°
23
74°
48°
24
80°
51°
25
84°
53°
26
77°
52°
27
74°
51°
28
72°
52°
29
78°
53°
30
82°
55°
31
86°
56°
1
80°
57°
2
87°
59°
3
75°
54°
4
74°
51°
5
72°
52°
6
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort Collins
Fort Collins's May 2026 forecast shows daily high temperatures ranging from 60° to 87°, with overnight lows between 42° and 59°. The average high for May is 76° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Fort Collins. See also: June | July | August.
