S
M
T
W
T
F
S
30
66°
44°
31
66°
44°
1
67°
51°
2
72°
51°
3
64°
50°
4
64°
50°
5
65°
45°
6
66°
47°
7
67°
45°
8
65°
47°
9
65°
41°
10
63°
44°
11
66°
39°
12
61°
41°
13
62°
42°
14
65°
43°
15
64°
38°
16
60°
37°
17
57°
36°
18
58°
37°
19
57°
38°
20
58°
40°
21
58°
37°
22
65°
37°
23
65°
44°
24
64°
44°
25
65°
43°
26
60°
44°
27
63°
35°
28
61°
32°
29
54°
33°
30
54°
42°
1
57°
43°
2
60°
43°
3
61°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Vallée-Jonction
Vallée-Jonction's September 2026 forecast shows daily high temperatures ranging from 54° to 72°, with overnight lows between 32° and 51°. The average high for September is 62° with an average low of 42°. 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 Vallée-Jonction. See also: October | November | December.
