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°
42°
23
77°
48°
24
80°
51°
25
81°
53°
26
79°
51°
27
72°
51°
28
76°
53°
29
80°
51°
30
79°
53°
31
80°
55°
1
82°
53°
2
77°
54°
3
78°
53°
4
82°
58°
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 69° to 82°, with overnight lows between 42° and 58°. The average high for May is 77° with an average low of 52°. 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.
