S
M
T
W
T
F
S
26
48°
39°
27
49°
39°
28
50°
38°
29
51°
40°
30
52°
42°
1
50°
41°
2
51°
42°
3
49°
42°
4
49°
40°
5
50°
38°
6
54°
46°
7
55°
46°
8
55°
43°
9
56°
46°
10
54°
39°
11
51°
38°
12
51°
38°
13
50°
39°
14
52°
40°
15
53°
43°
16
54°
44°
17
57°
49°
18
60°
42°
19
54°
41°
20
55°
46°
21
59°
51°
22
62°
52°
23
62°
53°
24
65°
52°
25
60°
49°
26
61°
53°
27
66°
52°
28
67°
51°
29
68°
52°
30
65°
50°
31
61°
48°
1
60°
47°
2
64°
51°
3
70°
55°
4
70°
55°
5
71°
56°
6
65°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cobourg
Cobourg's May 2026 forecast shows daily high temperatures ranging from 48° to 71°, with overnight lows between 38° and 56°. The average high for May is 57° 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 Cobourg. See also: June | July | August.