S
M
T
W
T
F
S
26
82°
58°
27
87°
66°
28
77°
57°
29
69°
48°
30
65°
48°
1
59°
44°
2
63°
43°
3
70°
49°
4
74°
53°
5
75°
59°
6
71°
54°
7
62°
44°
8
66°
47°
9
67°
49°
10
67°
52°
11
72°
53°
12
72°
53°
13
66°
50°
14
65°
50°
15
66°
49°
16
67°
50°
17
69°
53°
18
72°
58°
19
73°
58°
20
75°
59°
21
76°
59°
22
76°
60°
23
77°
60°
24
78°
61°
25
77°
61°
26
74°
60°
27
75°
58°
28
76°
58°
29
77°
60°
30
78°
62°
31
79°
62°
1
79°
63°
2
80°
63°
3
81°
64°
4
81°
64°
5
80°
63°
6
80°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Flat
Flat's May 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 43° and 64°. The average high for May is 73° 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. See also: June | July | August.
