S
M
T
W
T
F
S
30
92°
74°
31
93°
74°
1
92°
73°
2
92°
72°
3
93°
71°
4
93°
72°
5
94°
73°
6
94°
73°
7
93°
74°
8
94°
73°
9
94°
71°
10
93°
68°
11
91°
69°
12
92°
69°
13
90°
68°
14
88°
67°
15
89°
66°
16
88°
68°
17
92°
67°
18
93°
71°
19
93°
69°
20
Hist. Avg.
90°
69°
21
Hist. Avg.
90°
68°
22
Hist. Avg.
89°
68°
23
Hist. Avg.
89°
68°
24
Hist. Avg.
89°
67°
25
Hist. Avg.
89°
67°
26
Hist. Avg.
88°
67°
27
Hist. Avg.
88°
66°
28
Hist. Avg.
88°
66°
29
Hist. Avg.
88°
66°
30
Hist. Avg.
87°
65°
1
Hist. Avg.
87°
65°
2
Hist. Avg.
87°
65°
3
Hist. Avg.
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Tomball
Tomball's September 2026 forecast shows daily high temperatures ranging from 88° to 94°, with overnight lows between 66° and 74°. The average high for September is 92° with an average low of 71°. 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 Tomball. See also: October | November | December.
