S
M
T
W
T
F
S
26
84°
55°
27
83°
58°
28
80°
63°
29
75°
59°
30
66°
49°
1
N/A
2
64°
36°
3
67°
47°
4
80°
56°
5
79°
65°
6
73°
47°
7
64°
39°
8
68°
51°
9
73°
52°
10
75°
55°
11
73°
52°
12
73°
56°
13
78°
59°
14
78°
60°
15
79°
54°
16
77°
58°
17
79°
59°
18
79°
59°
19
81°
60°
20
80°
60°
21
78°
55°
22
75°
52°
23
73°
51°
24
74°
53°
25
75°
55°
26
76°
53°
27
75°
53°
28
76°
54°
29
77°
55°
30
80°
62°
31
81°
63°
1
79°
63°
2
78°
62°
3
79°
59°
4
79°
59°
5
82°
64°
6
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Flat Rock
Flat Rock's May 2026 forecast shows daily high temperatures ranging from 64° to 85°, with overnight lows between 36° and 65°. The average high for May is 76° with an average low of 56°. 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 Flat Rock. See also: June | July | August.