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
58°
44°
21
68°
40°
22
69°
36°
23
75°
48°
24
84°
51°
25
81°
53°
26
79°
51°
27
72°
53°
28
80°
53°
29
78°
51°
30
76°
53°
31
74°
52°
1
79°
53°
2
78°
54°
3
80°
55°
4
82°
56°
5
89°
60°
6
77°
51°
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 72° to 89°, with overnight lows between 48° and 60°. The average high for May is 79° with an average low of 53°. 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.
