S
M
T
W
T
F
S
30
76°
51°
31
73°
49°
1
70°
48°
2
66°
48°
3
63°
59°
4
74°
58°
5
70°
58°
6
69°
52°
7
N/A
8
73°
50°
9
63°
61°
10
80°
56°
11
73°
49°
12
70°
54°
13
71°
58°
14
75°
56°
15
69°
57°
16
69°
52°
17
68°
52°
18
67°
50°
19
66°
53°
20
64°
50°
21
61°
53°
22
62°
54°
23
64°
54°
24
67°
53°
25
63°
53°
26
63°
50°
27
60°
48°
28
61°
48°
29
66°
52°
30
67°
52°
1
67°
51°
2
64°
52°
3
62°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Thomaston
Thomaston's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 48° and 61°. The average high for September is 67° with an average low of 53°. 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.
