S
M
T
W
T
F
S
30
100°
73°
31
100°
75°
1
100°
76°
2
101°
70°
3
104°
74°
4
101°
72°
5
99°
70°
6
97°
69°
7
99°
73°
8
99°
73°
9
99°
73°
10
99°
74°
11
102°
73°
12
104°
75°
13
101°
72°
14
95°
70°
15
90°
66°
16
92°
68°
17
92°
67°
18
91°
66°
19
92°
62°
20
86°
61°
21
88°
67°
22
90°
66°
23
84°
66°
24
80°
65°
25
80°
65°
26
81°
64°
27
80°
64°
28
81°
63°
29
82°
64°
30
84°
54°
1
76°
52°
2
76°
51°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Robert Lee
Robert Lee's September 2026 forecast shows daily high temperatures ranging from 75° to 104°, with overnight lows between 51° and 75°. The average high for September is 89° with an average low of 65°. 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 Robert Lee. See also: October | November | December.
