S
M
T
W
T
F
S
26
81°
51°
27
83°
59°
28
78°
63°
29
69°
54°
30
64°
46°
1
63°
43°
2
61°
40°
3
68°
37°
4
82°
52°
5
69°
51°
6
60°
47°
7
65°
46°
8
74°
42°
9
79°
55°
10
74°
58°
11
75°
51°
12
80°
47°
13
78°
56°
14
70°
45°
15
81°
46°
16
83°
69°
17
88°
66°
18
89°
68°
19
90°
69°
20
71°
63°
21
66°
61°
22
69°
61°
23
79°
63°
24
75°
65°
25
78°
64°
26
79°
68°
27
82°
65°
28
84°
63°
29
75°
62°
30
80°
60°
31
81°
59°
1
81°
56°
2
80°
57°
3
81°
60°
4
78°
59°
5
82°
64°
6
85°
68°
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 75° to 85°, with overnight lows between 56° and 68°. The average high for May is 81° with an average low of 62°. 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.
