S
M
T
W
T
F
S
31
74°
43°
1
79°
46°
2
79°
49°
3
78°
49°
4
81°
48°
5
73°
56°
6
60°
48°
7
67°
41°
8
65°
39°
9
68°
37°
10
72°
40°
11
71°
37°
12
70°
34°
13
70°
40°
14
74°
43°
15
72°
40°
16
76°
42°
17
75°
42°
18
78°
47°
19
63°
31°
20
63°
29°
21
69°
29°
22
66°
40°
23
74°
50°
24
69°
45°
25
59°
53°
26
68°
38°
27
66°
33°
28
74°
41°
29
75°
39°
30
61°
32°
1
60°
31°
2
62°
29°
3
69°
29°
4
75°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plessisville
Plessisville's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Plessisville. See also: October | November | December.