S
M
T
W
T
F
S
26
63°
44°
27
55°
35°
28
53°
34°
29
54°
31°
30
55°
32°
1
51°
30°
2
56°
31°
3
57°
33°
4
58°
37°
5
62°
38°
6
55°
32°
7
56°
33°
8
56°
34°
9
57°
33°
10
58°
42°
11
57°
43°
12
60°
44°
13
59°
39°
14
57°
38°
15
58°
37°
16
59°
39°
17
60°
40°
18
59°
38°
19
60°
38°
20
61°
40°
21
62°
45°
22
66°
43°
23
63°
41°
24
62°
40°
25
62°
41°
26
63°
42°
27
64°
47°
28
65°
44°
29
67°
48°
30
66°
50°
31
70°
49°
1
75°
52°
2
76°
54°
3
75°
55°
4
76°
54°
5
78°
55°
6
69°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Merrill
Merrill's May 2026 forecast shows daily high temperatures ranging from 51° to 78°, with overnight lows between 30° and 56°. The average high for May is 62° with an average low of 41°. 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 Merrill. See also: June | July | August.
