S
M
T
W
T
F
S
30
60°
48°
31
60°
47°
1
57°
47°
2
63°
44°
3
62°
46°
4
52°
46°
5
53°
43°
6
63°
43°
7
59°
45°
8
60°
46°
9
60°
44°
10
59°
46°
11
53°
45°
12
58°
45°
13
60°
48°
14
55°
44°
15
54°
42°
16
58°
46°
17
56°
41°
18
55°
41°
19
56°
42°
20
53°
42°
21
58°
43°
22
60°
44°
23
N/A
24
67°
45°
25
65°
43°
26
64°
44°
27
56°
42°
28
54°
43°
29
52°
44°
30
55°
48°
1
60°
50°
2
59°
44°
3
59°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Rimouski
Rimouski's September 2026 forecast shows daily high temperatures ranging from 52° to 67°, with overnight lows between 42° and 50°. The average high for September is 59° with an average low of 45°. 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 Rimouski. See also: October | November | December.
