S
M
T
W
T
F
S
30
90°
70°
31
89°
69°
1
91°
69°
2
90°
68°
3
85°
64°
4
85°
62°
5
83°
62°
6
86°
65°
7
87°
66°
8
87°
67°
9
89°
67°
10
84°
63°
11
83°
60°
12
84°
65°
13
88°
60°
14
85°
58°
15
81°
58°
16
82°
57°
17
81°
58°
18
82°
59°
19
86°
61°
20
87°
63°
21
88°
63°
22
87°
64°
23
85°
63°
24
84°
60°
25
85°
60°
26
86°
61°
27
86°
59°
28
85°
60°
29
86°
61°
30
85°
60°
1
85°
60°
2
84°
59°
3
84°
52°
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 81° to 91°, with overnight lows between 52° and 70°. The average high for September is 86° with an average low of 62°. 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.
