S
M
T
W
T
F
S
30
76°
54°
31
75°
53°
1
77°
54°
2
77°
48°
3
73°
44°
4
66°
43°
5
66°
52°
6
67°
53°
7
74°
52°
8
73°
51°
9
71°
46°
10
70°
48°
11
72°
50°
12
73°
52°
13
73°
51°
14
72°
48°
15
72°
41°
16
64°
40°
17
64°
47°
18
65°
42°
19
62°
39°
20
62°
38°
21
58°
35°
22
59°
46°
23
60°
42°
24
60°
37°
25
57°
35°
26
58°
43°
27
61°
44°
28
64°
35°
29
60°
36°
30
56°
38°
1
56°
37°
2
58°
33°
3
54°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Eganville
Eganville's September 2026 forecast shows daily high temperatures ranging from 54° to 77°, with overnight lows between 32° and 54°. The average high for September is 66° with an average low of 44°. 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 Eganville. See also: October | November | December.