S
M
T
W
T
F
S
26
54°
35°
27
60°
35°
28
62°
37°
29
61°
36°
30
51°
35°
1
64°
36°
2
73°
42°
3
74°
43°
4
66°
43°
5
58°
40°
6
70°
43°
7
79°
46°
8
82°
48°
9
74°
48°
10
74°
46°
11
71°
46°
12
67°
47°
13
82°
53°
14
62°
42°
15
62°
40°
16
63°
40°
17
64°
41°
18
65°
42°
19
66°
43°
20
66°
45°
21
64°
46°
22
66°
42°
23
67°
43°
24
64°
43°
25
63°
42°
26
64°
43°
27
67°
42°
28
69°
43°
29
76°
48°
30
78°
53°
31
71°
53°
1
76°
51°
2
77°
50°
3
77°
51°
4
80°
53°
5
77°
53°
6
79°
55°
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 51° to 82°, with overnight lows between 35° and 55°. The average high for May is 70° with an average low of 45°. 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.
