S
M
T
W
T
F
S
26
66°
37°
27
68°
41°
28
63°
46°
29
63°
46°
30
72°
46°
1
72°
46°
2
72°
50°
3
66°
54°
4
61°
50°
5
63°
50°
6
57°
46°
7
57°
45°
8
64°
43°
9
68°
45°
10
55°
41°
11
54°
36°
12
N/A
13
52°
38°
14
53°
38°
15
55°
38°
16
55°
43°
17
57°
41°
18
62°
46°
19
61°
49°
20
65°
50°
21
68°
51°
22
67°
50°
23
66°
49°
24
67°
50°
25
57°
50°
26
59°
49°
27
59°
46°
28
60°
45°
29
59°
50°
30
60°
49°
31
59°
48°
1
60°
49°
2
59°
47°
3
60°
48°
4
64°
50°
5
60°
46°
6
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Keymer
Keymer's May 2026 forecast shows daily high temperatures ranging from 52° to 68°, with overnight lows between 38° and 51°. The average high for May is 60° with an average low of 47°. 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 Keymer. See also: June | July | August.