S
M
T
W
T
F
S
26
60°
40°
27
62°
41°
28
56°
40°
29
60°
45°
30
59°
44°
1
61°
46°
2
62°
46°
3
61°
45°
4
59°
44°
5
59°
44°
6
61°
43°
7
59°
46°
8
62°
44°
9
62°
43°
10
61°
46°
11
62°
43°
12
62°
43°
13
63°
47°
14
62°
44°
15
63°
47°
16
60°
46°
17
63°
49°
18
63°
49°
19
62°
48°
20
62°
49°
21
61°
49°
22
59°
48°
23
59°
49°
24
60°
47°
25
59°
47°
26
60°
44°
27
60°
45°
28
65°
49°
29
62°
46°
30
61°
46°
31
62°
47°
1
63°
44°
2
64°
45°
3
67°
49°
4
67°
49°
5
66°
47°
6
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cumnor
Cumnor's May 2026 forecast shows daily high temperatures ranging from 56° to 68°, with overnight lows between 40° and 49°. The average high for May is 62° with an average low of 46°. 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 Cumnor. See also: June | July | August.