S
M
T
W
T
F
S
26
66°
45°
27
70°
46°
28
63°
46°
29
64°
46°
30
70°
52°
1
75°
46°
2
72°
50°
3
66°
54°
4
61°
54°
5
61°
52°
6
57°
46°
7
61°
45°
8
66°
46°
9
70°
46°
10
55°
41°
11
55°
36°
12
61°
37°
13
55°
45°
14
57°
43°
15
57°
43°
16
57°
39°
17
61°
48°
18
57°
46°
19
64°
52°
20
70°
54°
21
73°
54°
22
80°
58°
23
80°
54°
24
84°
60°
25
90°
60°
26
86°
55°
27
75°
50°
28
75°
50°
29
79°
56°
30
74°
55°
31
69°
52°
1
71°
52°
2
68°
53°
3
69°
52°
4
61°
47°
5
62°
47°
6
61°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Flackwell Heath
Flackwell Heath's May 2026 forecast shows daily high temperatures ranging from 61° to 90°, with overnight lows between 46° and 60°. The average high for May is 74° with an average low of 53°. 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 Flackwell Heath. See also: June | July | August.