S
M
T
W
T
F
S
26
59°
22°
27
51°
35°
28
53°
23°
29
56°
26°
30
51°
30°
1
65°
21°
2
74°
41°
3
77°
34°
4
52°
36°
5
47°
30°
6
54°
23°
7
65°
22°
8
72°
35°
9
62°
38°
10
64°
30°
11
84°
40°
12
76°
45°
13
81°
34°
14
80°
54°
15
77°
50°
16
65°
43°
17
48°
42°
18
44°
40°
19
58°
36°
20
72°
35°
21
73°
45°
22
58°
47°
23
73°
41°
24
84°
44°
25
91°
47°
26
93°
57°
27
90°
64°
28
91°
65°
29
89°
62°
30
85°
63°
31
88°
58°
1
86°
57°
2
82°
53°
3
83°
54°
4
87°
56°
5
85°
55°
6
87°
60°
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 82° to 91°, with overnight lows between 53° and 65°. The average high for May is 87° with an average low of 59°. 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.
