S
M
T
W
T
F
S
26
90°
61°
27
82°
63°
28
90°
57°
29
91°
68°
30
90°
70°
1
86°
66°
2
68°
55°
3
77°
50°
4
84°
48°
5
86°
57°
6
91°
59°
7
88°
68°
8
86°
66°
9
77°
64°
10
86°
68°
11
91°
68°
12
77°
68°
13
84°
66°
14
88°
61°
15
88°
52°
16
93°
66°
17
95°
68°
18
91°
68°
19
93°
68°
20
91°
66°
21
93°
68°
22
91°
70°
23
91°
73°
24
90°
72°
25
93°
72°
26
N/A
27
88°
72°
28
82°
71°
29
86°
71°
30
87°
72°
31
86°
73°
1
83°
70°
2
86°
68°
3
87°
69°
4
83°
70°
5
84°
71°
6
85°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Mercer
Mercer's May 2026 forecast shows daily high temperatures ranging from 82° to 88°, with overnight lows between 68° and 73°. The average high for May is 85° with an average low of 71°. 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.
