S
M
T
W
T
F
S
30
71°
61°
31
72°
63°
1
74°
65°
2
76°
60°
3
75°
61°
4
72°
60°
5
71°
61°
6
73°
62°
7
74°
60°
8
72°
62°
9
72°
59°
10
73°
58°
11
71°
53°
12
71°
58°
13
73°
59°
14
66°
57°
15
67°
58°
16
72°
57°
17
71°
55°
18
63°
53°
19
65°
56°
20
71°
58°
21
71°
58°
22
72°
57°
23
72°
56°
24
70°
55°
25
69°
55°
26
69°
54°
27
70°
55°
28
70°
53°
29
68°
52°
30
62°
50°
1
61°
52°
2
66°
53°
3
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cobourg
Cobourg's September 2026 forecast shows daily high temperatures ranging from 61° to 76°, with overnight lows between 50° and 65°. The average high for September is 70° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Cobourg. See also: October | November | December.
