S
M
T
W
T
F
S
26
59°
35°
27
71°
35°
28
63°
51°
29
59°
46°
30
51°
37°
1
50°
35°
2
48°
35°
3
57°
33°
4
74°
48°
5
73°
46°
6
48°
39°
7
50°
38°
8
53°
40°
9
59°
44°
10
65°
43°
11
50°
38°
12
54°
40°
13
53°
45°
14
59°
47°
15
65°
50°
16
62°
45°
17
59°
48°
18
60°
47°
19
66°
48°
20
61°
43°
21
62°
44°
22
62°
44°
23
64°
47°
24
64°
47°
25
66°
52°
26
67°
52°
27
65°
49°
28
66°
47°
29
65°
46°
30
69°
53°
31
73°
56°
1
73°
54°
2
68°
50°
3
72°
54°
4
76°
58°
5
76°
59°
6
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Romulus
Romulus's May 2026 forecast shows daily high temperatures ranging from 48° to 76°, with overnight lows between 38° and 59°. The average high for May is 63° with an average low of 48°. 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 Romulus. See also: June | July | August.