S
M
T
W
T
F
S
30
92°
70°
31
91°
71°
1
90°
70°
2
92°
70°
3
91°
69°
4
88°
67°
5
86°
67°
6
89°
64°
7
90°
68°
8
91°
69°
9
91°
69°
10
90°
68°
11
91°
69°
12
90°
68°
13
90°
69°
14
88°
65°
15
90°
67°
16
91°
66°
17
90°
67°
18
86°
64°
19
90°
64°
20
88°
65°
21
89°
63°
22
88°
64°
23
87°
63°
24
85°
63°
25
86°
62°
26
85°
63°
27
84°
62°
28
82°
62°
29
85°
61°
30
85°
61°
1
86°
60°
2
84°
53°
3
82°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thomaston
Thomaston's September 2026 forecast shows daily high temperatures ranging from 82° to 92°, with overnight lows between 53° and 71°. The average high for September is 88° with an average low of 65°. 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 Thomaston. See also: October | November | December.
