S
M
T
W
T
F
S
30
74°
53°
31
77°
59°
1
79°
60°
2
79°
59°
3
74°
56°
4
74°
52°
5
73°
51°
6
72°
50°
7
74°
57°
8
77°
52°
9
71°
49°
10
72°
50°
11
75°
45°
12
69°
47°
13
71°
48°
14
69°
47°
15
70°
46°
16
71°
47°
17
69°
46°
18
73°
48°
19
69°
45°
20
69°
44°
21
67°
43°
22
68°
44°
23
71°
48°
24
74°
43°
25
74°
48°
26
73°
50°
27
70°
47°
28
65°
44°
29
72°
44°
30
70°
40°
1
64°
44°
2
71°
49°
3
71°
39°
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 64° to 79°, with overnight lows between 39° and 60°. The average high for September is 72° with an average low of 48°. 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.
