S
M
T
W
T
F
S
30
72°
66°
31
68°
65°
1
82°
65°
2
82°
63°
3
76°
56°
4
75°
53°
5
73°
55°
6
73°
55°
7
72°
53°
8
70°
52°
9
72°
57°
10
73°
53°
11
71°
49°
12
73°
53°
13
73°
55°
14
67°
52°
15
68°
54°
16
73°
53°
17
72°
50°
18
64°
48°
19
67°
52°
20
72°
54°
21
72°
54°
22
71°
53°
23
72°
52°
24
70°
51°
25
70°
50°
26
69°
51°
27
70°
52°
28
70°
50°
29
68°
48°
30
63°
47°
1
61°
49°
2
67°
50°
3
68°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stouffville
Stouffville's September 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 47° and 65°. The average high for September is 71° with an average low of 53°. 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 Stouffville. See also: October | November | December.
