S
M
T
W
T
F
S
26
64°
46°
27
79°
37°
28
69°
51°
29
65°
52°
30
55°
37°
1
63°
35°
2
52°
33°
3
60°
32°
4
73°
44°
5
76°
53°
6
63°
51°
7
60°
41°
8
67°
35°
9
69°
50°
10
67°
47°
11
63°
41°
12
72°
38°
13
68°
45°
14
51°
40°
15
67°
36°
16
75°
42°
17
84°
55°
18
90°
55°
19
87°
63°
20
74°
50°
21
65°
56°
22
63°
57°
23
73°
64°
24
75°
62°
25
76°
64°
26
78°
65°
27
75°
61°
28
79°
63°
29
77°
58°
30
78°
61°
31
80°
62°
1
76°
56°
2
76°
61°
3
77°
60°
4
74°
59°
5
72°
57°
6
75°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairmont
Fairmont's May 2026 forecast shows daily high temperatures ranging from 63° to 87°, with overnight lows between 50° and 65°. The average high for May is 75° with an average low of 60°. 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 Fairmont. See also: June | July | August.