S
M
T
W
T
F
S
26
54°
34°
27
46°
37°
28
48°
32°
29
52°
28°
30
52°
27°
1
54°
27°
2
70°
32°
3
72°
41°
4
61°
39°
5
45°
27°
6
43°
30°
7
61°
27°
8
70°
37°
9
57°
39°
10
57°
39°
11
70°
34°
12
70°
50°
13
77°
56°
14
77°
51°
15
82°
50°
16
71°
48°
17
58°
49°
18
57°
43°
19
53°
38°
20
64°
43°
21
61°
46°
22
66°
48°
23
70°
50°
24
72°
55°
25
75°
53°
26
71°
49°
27
64°
47°
28
65°
46°
29
64°
52°
30
66°
48°
31
67°
46°
1
66°
47°
2
67°
56°
3
71°
58°
4
76°
59°
5
79°
58°
6
78°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fergus Falls
Fergus Falls's May 2026 forecast shows daily high temperatures ranging from 53° to 82°, with overnight lows between 38° and 59°. The average high for May is 69° with an average low of 50°. 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 Fergus Falls. See also: June | July | August.