S
M
T
W
T
F
S
26
68°
54°
27
70°
49°
28
72°
43°
29
83°
56°
30
74°
57°
1
68°
57°
2
59°
47°
3
69°
41°
4
80°
46°
5
82°
49°
6
85°
57°
7
77°
55°
8
72°
51°
9
76°
56°
10
86°
61°
11
79°
56°
12
72°
49°
13
81°
50°
14
79°
55°
15
78°
46°
16
87°
52°
17
91°
59°
18
92°
66°
19
92°
62°
20
91°
62°
21
93°
64°
22
82°
68°
23
82°
68°
24
79°
70°
25
80°
70°
26
84°
70°
27
86°
69°
28
88°
68°
29
84°
66°
30
78°
61°
31
77°
58°
1
80°
61°
2
82°
63°
3
85°
64°
4
84°
66°
5
87°
65°
6
82°
61°
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 77° to 88°, with overnight lows between 58° and 70°. The average high for May is 83° with an average low of 65°. 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.