S
M
T
W
T
F
S
30
86°
61°
31
82°
60°
1
81°
60°
2
81°
61°
3
82°
65°
4
83°
60°
5
86°
60°
6
82°
59°
7
80°
58°
8
81°
59°
9
80°
58°
10
81°
62°
11
84°
63°
12
78°
63°
13
81°
63°
14
84°
63°
15
Hist. Avg.
82°
55°
16
Hist. Avg.
81°
55°
17
Hist. Avg.
81°
54°
18
Hist. Avg.
81°
54°
19
Hist. Avg.
80°
54°
20
Hist. Avg.
80°
53°
21
Hist. Avg.
79°
53°
22
Hist. Avg.
79°
52°
23
Hist. Avg.
78°
52°
24
Hist. Avg.
78°
52°
25
Hist. Avg.
78°
51°
26
Hist. Avg.
77°
51°
27
Hist. Avg.
77°
50°
28
Hist. Avg.
76°
50°
29
Hist. Avg.
76°
49°
30
Hist. Avg.
76°
49°
1
Hist. Avg.
75°
48°
2
Hist. Avg.
75°
48°
3
Hist. Avg.
74°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Whitestone
Whitestone's September 2026 forecast shows daily high temperatures ranging from 78° to 86°, with overnight lows between 58° and 65°. The average high for September is 82° with an average low of 61°. 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 Whitestone. See also: October | November | December.