S
M
T
W
T
F
S
30
70°
57°
31
72°
55°
1
72°
50°
2
64°
57°
3
75°
63°
4
66°
54°
5
70°
54°
6
79°
55°
7
73°
57°
8
61°
54°
9
N/A
10
67°
56°
11
70°
50°
12
71°
59°
13
72°
56°
14
75°
59°
15
71°
51°
16
66°
51°
17
65°
50°
18
68°
51°
19
71°
53°
20
68°
51°
21
69°
52°
22
67°
51°
23
68°
51°
24
67°
50°
25
64°
49°
26
63°
49°
27
65°
50°
28
64°
44°
29
59°
43°
30
59°
43°
1
58°
49°
2
63°
49°
3
62°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stewartby
Stewartby's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 43° and 59°. The average high for September is 66° with an average low of 51°. 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 Stewartby. See also: October | November | December.
