S
M
T
W
T
F
S
26
59°
43°
27
59°
41°
28
61°
43°
29
68°
37°
30
72°
41°
1
N/A
2
58°
47°
3
54°
42°
4
54°
40°
5
52°
37°
6
52°
36°
7
54°
39°
8
56°
42°
9
57°
40°
10
56°
42°
11
57°
44°
12
58°
43°
13
57°
44°
14
54°
40°
15
54°
46°
16
57°
45°
17
55°
44°
18
55°
44°
19
56°
45°
20
55°
45°
21
55°
44°
22
56°
42°
23
55°
42°
24
55°
41°
25
56°
41°
26
55°
42°
27
57°
46°
28
56°
47°
29
58°
44°
30
56°
42°
31
56°
42°
1
55°
41°
2
56°
42°
3
55°
43°
4
56°
43°
5
56°
44°
6
57°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Cumnock
Cumnock's May 2026 forecast shows daily high temperatures ranging from 52° to 58°, with overnight lows between 36° and 47°. The average high for May is 56° with an average low of 43°. 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 Cumnock. See also: June | July | August.