S
M
T
W
T
F
S
26
50°
42°
27
64°
38°
28
53°
46°
29
55°
49°
30
54°
39°
1
58°
34°
2
47°
35°
3
55°
32°
4
70°
44°
5
77°
53°
6
64°
46°
7
67°
41°
8
65°
48°
9
69°
50°
10
75°
47°
11
62°
38°
12
61°
41°
13
63°
43°
14
63°
42°
15
73°
48°
16
76°
47°
17
74°
50°
18
77°
54°
19
76°
52°
20
77°
48°
21
69°
46°
22
69°
47°
23
70°
47°
24
70°
45°
25
71°
46°
26
72°
48°
27
73°
46°
28
74°
47°
29
77°
49°
30
80°
53°
31
81°
56°
1
76°
56°
2
81°
54°
3
82°
56°
4
83°
57°
5
83°
57°
6
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Keyser
Keyser's May 2026 forecast shows daily high temperatures ranging from 61° to 83°, with overnight lows between 38° and 58°. The average high for May is 73° with an average low of 49°. 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 Keyser. See also: June | July | August.