S
M
T
W
T
F
S
30
70°
66°
31
76°
66°
1
78°
70°
2
85°
69°
3
81°
67°
4
76°
63°
5
75°
61°
6
71°
56°
7
76°
55°
8
76°
58°
9
76°
63°
10
78°
65°
11
72°
55°
12
77°
54°
13
81°
62°
14
68°
53°
15
75°
53°
16
77°
66°
17
72°
66°
18
69°
63°
19
64°
58°
20
68°
56°
21
63°
56°
22
60°
56°
23
64°
47°
24
65°
43°
25
67°
43°
26
68°
52°
27
71°
54°
28
66°
60°
29
72°
58°
30
76°
53°
1
77°
61°
2
69°
51°
3
63°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Smithville
Smithville's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 49° and 61°. The average high for September is 70° with an average low of 54°. 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 Smithville. See also: October | November | December.
