S
M
T
W
T
F
S
26
65°
44°
27
73°
50°
28
73°
54°
29
66°
53°
30
N/A
1
53°
40°
2
49°
38°
3
54°
40°
4
58°
51°
5
62°
50°
6
56°
43°
7
55°
39°
8
50°
40°
9
53°
43°
10
59°
44°
11
61°
44°
12
61°
45°
13
59°
46°
14
57°
43°
15
60°
42°
16
60°
41°
17
61°
41°
18
61°
48°
19
65°
49°
20
70°
50°
21
71°
47°
22
65°
43°
23
62°
47°
24
62°
45°
25
63°
44°
26
64°
43°
27
63°
48°
28
64°
50°
29
69°
53°
30
70°
48°
31
70°
45°
1
65°
44°
2
65°
45°
3
66°
45°
4
65°
48°
5
66°
46°
6
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mercier
Mercier's May 2026 forecast shows daily high temperatures ranging from 49° to 71°, with overnight lows between 38° and 53°. The average high for May is 62° with an average low of 45°. 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 Mercier. See also: June | July | August.
