S
M
T
W
T
F
S
26
75°
54°
27
70°
47°
28
60°
45°
29
60°
41°
30
61°
38°
1
60°
37°
2
61°
36°
3
72°
48°
4
82°
53°
5
56°
46°
6
58°
41°
7
69°
39°
8
69°
43°
9
78°
49°
10
69°
38°
11
78°
43°
12
82°
56°
13
74°
47°
14
78°
47°
15
-100°
-100°
16
83°
66°
17
86°
68°
18
86°
56°
19
67°
45°
20
69°
49°
21
72°
51°
22
77°
58°
23
80°
57°
24
77°
59°
25
77°
61°
26
78°
64°
27
80°
63°
28
76°
56°
29
75°
55°
30
71°
55°
31
70°
56°
1
72°
53°
2
72°
57°
3
73°
62°
4
82°
64°
5
82°
64°
6
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mercer
Mercer's May 2026 forecast shows daily high temperatures ranging from 67° to 86°, with overnight lows between 45° and 68°. The average high for May is 77° with an average low of 58°. 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 Mercer. See also: June | July | August.
