S
M
T
W
T
F
S
30
99°
72°
31
99°
72°
1
98°
73°
2
101°
71°
3
100°
75°
4
97°
75°
5
99°
71°
6
97°
73°
7
100°
72°
8
100°
73°
9
99°
73°
10
N/A
11
98°
76°
12
101°
76°
13
98°
76°
14
99°
73°
15
99°
71°
16
98°
72°
17
100°
71°
18
95°
70°
19
92°
64°
20
89°
63°
21
89°
64°
22
88°
65°
23
90°
66°
24
88°
62°
25
91°
68°
26
89°
67°
27
86°
67°
28
87°
66°
29
89°
67°
30
89°
66°
1
88°
66°
2
87°
65°
3
87°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lampasas
Lampasas's September 2026 forecast shows daily high temperatures ranging from 86° to 101°, with overnight lows between 62° and 76°. The average high for September is 92° with an average low of 68°. 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 Lampasas. See also: October | November | December.