S
M
T
W
T
F
S
30
84°
66°
31
84°
66°
1
85°
64°
2
78°
60°
3
77°
59°
4
77°
60°
5
78°
58°
6
80°
62°
7
83°
64°
8
83°
64°
9
82°
63°
10
84°
64°
11
84°
63°
12
85°
64°
13
85°
64°
14
84°
57°
15
77°
55°
16
75°
55°
17
74°
54°
18
82°
59°
19
83°
60°
20
83°
60°
21
82°
56°
22
81°
51°
23
73°
54°
24
71°
58°
25
72°
57°
26
79°
57°
27
79°
56°
28
78°
57°
29
78°
57°
30
77°
56°
1
77°
55°
2
78°
50°
3
73°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Townsend
Townsend's September 2026 forecast shows daily high temperatures ranging from 71° to 85°, with overnight lows between 46° and 66°. The average high for September is 80° with an average low of 59°. 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 Townsend. See also: October | November | December.