S
M
T
W
T
F
S
30
99°
73°
31
98°
74°
1
100°
74°
2
101°
73°
3
89°
76°
4
95°
78°
5
95°
74°
6
97°
75°
7
100°
73°
8
100°
76°
9
99°
76°
10
98°
75°
11
98°
76°
12
99°
76°
13
98°
75°
14
102°
75°
15
101°
76°
16
99°
76°
17
99°
75°
18
96°
73°
19
97°
69°
20
98°
71°
21
98°
76°
22
101°
72°
23
100°
73°
24
N/A
25
97°
71°
26
91°
66°
27
97°
67°
28
98°
72°
29
98°
70°
30
97°
75°
1
86°
72°
2
84°
73°
3
83°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Thorndale
Thorndale's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.