S
M
T
W
T
F
S
30
96°
74°
31
96°
73°
1
95°
74°
2
94°
73°
3
94°
73°
4
93°
72°
5
94°
72°
6
94°
71°
7
94°
73°
8
95°
73°
9
94°
72°
10
94°
73°
11
93°
68°
12
92°
70°
13
94°
70°
14
95°
64°
15
94°
67°
16
93°
69°
17
93°
69°
18
94°
68°
19
94°
69°
20
93°
69°
21
90°
67°
22
88°
61°
23
84°
61°
24
82°
59°
25
82°
60°
26
83°
64°
27
91°
66°
28
92°
61°
29
90°
65°
30
91°
66°
1
92°
57°
2
90°
54°
3
81°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Whitney
Whitney's September 2026 forecast shows daily high temperatures ranging from 81° to 96°, with overnight lows between 53° and 74°. The average high for September is 92° with an average low of 67°. 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 Whitney. See also: October | November | December.