S
M
T
W
T
F
S
30
93°
73°
31
89°
73°
1
89°
72°
2
93°
73°
3
94°
73°
4
94°
72°
5
93°
72°
6
93°
71°
7
94°
71°
8
94°
71°
9
95°
70°
10
94°
68°
11
95°
69°
12
94°
67°
13
94°
70°
14
95°
70°
15
95°
66°
16
91°
67°
17
85°
67°
18
85°
66°
19
86°
66°
20
90°
68°
21
91°
67°
22
88°
64°
23
91°
63°
24
90°
64°
25
89°
64°
26
88°
65°
27
89°
62°
28
86°
61°
29
82°
61°
30
81°
59°
1
80°
58°
2
81°
59°
3
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Leander
Leander's September 2026 forecast shows daily high temperatures ranging from 80° to 95°, with overnight lows between 58° and 73°. The average high for September is 90° 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 Leander. See also: October | November | December.
