S
M
T
W
T
F
S
30
84°
65°
31
79°
61°
1
71°
59°
2
76°
60°
3
74°
59°
4
78°
60°
5
82°
60°
6
82°
62°
7
72°
64°
8
74°
59°
9
71°
58°
10
82°
53°
11
71°
56°
12
58°
51°
13
63°
45°
14
58°
45°
15
62°
44°
16
59°
43°
17
62°
47°
18
65°
44°
19
68°
58°
20
60°
43°
21
67°
45°
22
67°
45°
23
65°
50°
24
67°
56°
25
73°
60°
26
64°
52°
27
70°
53°
28
59°
45°
29
64°
47°
30
64°
45°
1
60°
43°
2
61°
42°
3
54°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ste. Agathe
Ste. Agathe's September 2026 forecast shows daily high temperatures ranging from 54° to 73°, with overnight lows between 40° and 60°. The average high for September is 64° with an average low of 48°. 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 Ste. Agathe. See also: October | November | December.
