S
M
T
W
T
F
S
26
62°
40°
27
66°
36°
28
59°
38°
29
52°
44°
30
53°
45°
1
62°
43°
2
59°
45°
3
54°
38°
4
72°
37°
5
82°
52°
6
73°
55°
7
62°
46°
8
60°
38°
9
52°
37°
10
73°
47°
11
62°
44°
12
62°
41°
13
60°
39°
14
62°
50°
15
54°
46°
16
78°
46°
17
86°
55°
18
74°
55°
19
94°
53°
20
87°
70°
21
70°
52°
22
66°
44°
23
64°
50°
24
54°
50°
25
68°
53°
26
79°
58°
27
77°
51°
28
64°
48°
29
68°
47°
30
69°
51°
31
71°
51°
1
74°
55°
2
71°
55°
3
73°
54°
4
74°
50°
5
76°
55°
6
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Merrimac
Merrimac's May 2026 forecast shows daily high temperatures ranging from 54° to 79°, with overnight lows between 44° and 58°. The average high for May is 70° with an average low of 52°. 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 Merrimac. See also: June | July | August.
