S
M
T
W
T
F
S
30
77°
56°
31
77°
60°
1
75°
60°
2
71°
60°
3
80°
63°
4
80°
62°
5
74°
57°
6
69°
52°
7
75°
48°
8
76°
52°
9
78°
57°
10
82°
61°
11
74°
54°
12
75°
49°
13
73°
64°
14
69°
49°
15
69°
52°
16
76°
60°
17
79°
64°
18
77°
50°
19
71°
56°
20
69°
56°
21
69°
50°
22
66°
47°
23
65°
46°
24
69°
50°
25
70°
49°
26
71°
48°
27
70°
48°
28
69°
45°
29
73°
46°
30
66°
43°
1
66°
44°
2
67°
48°
3
71°
46°
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 65° to 79°, with overnight lows between 43° and 64°. The average high for September is 70° with an average low of 50°. 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.
