S
M
T
W
T
F
S
30
84°
60°
31
85°
66°
1
90°
71°
2
92°
70°
3
91°
68°
4
82°
66°
5
79°
58°
6
80°
61°
7
79°
57°
8
74°
56°
9
75°
57°
10
78°
60°
11
78°
57°
12
75°
54°
13
74°
55°
14
75°
54°
15
77°
59°
16
74°
58°
17
75°
54°
18
71°
49°
19
74°
53°
20
78°
58°
21
79°
57°
22
79°
57°
23
78°
56°
24
79°
56°
25
77°
54°
26
76°
54°
27
77°
55°
28
76°
55°
29
77°
53°
30
74°
50°
1
72°
50°
2
74°
49°
3
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Canonsburg
Canonsburg's September 2026 forecast shows daily high temperatures ranging from 71° to 92°, with overnight lows between 49° and 71°. The average high for September is 78° with an average low of 57°. 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 Canonsburg. See also: October | November | December.
