S
M
T
W
T
F
S
30
95°
72°
31
97°
74°
1
98°
74°
2
98°
75°
3
97°
73°
4
93°
74°
5
91°
72°
6
94°
72°
7
96°
72°
8
95°
70°
9
89°
69°
10
94°
70°
11
95°
72°
12
91°
72°
13
92°
71°
14
85°
72°
15
86°
72°
16
84°
71°
17
85°
70°
18
87°
71°
19
88°
71°
20
84°
70°
21
84°
70°
22
85°
69°
23
87°
68°
24
88°
68°
25
89°
69°
26
88°
68°
27
89°
69°
28
88°
68°
29
88°
67°
30
88°
67°
1
87°
66°
2
85°
67°
3
85°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thorndale
Thorndale's September 2026 forecast shows daily high temperatures ranging from 84° to 98°, with overnight lows between 66° and 75°. The average high for September is 89° with an average low of 70°. 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 Thorndale. See also: October | November | December.
