S
M
T
W
T
F
S
30
100°
76°
31
100°
79°
1
100°
79°
2
101°
76°
3
101°
81°
4
94°
80°
5
97°
79°
6
99°
78°
7
99°
78°
8
100°
79°
9
99°
79°
10
98°
77°
11
101°
78°
12
101°
79°
13
101°
80°
14
102°
79°
15
103°
78°
16
101°
78°
17
94°
75°
18
95°
72°
19
97°
76°
20
98°
75°
21
94°
73°
22
96°
72°
23
94°
71°
24
96°
72°
25
95°
72°
26
96°
73°
27
87°
72°
28
87°
72°
29
88°
71°
30
90°
72°
1
90°
72°
2
89°
71°
3
86°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lackland Air Force Base
Lackland Air Force Base's September 2026 forecast shows daily high temperatures ranging from 86° to 103°, with overnight lows between 71° and 79°. The average high for September is 94° with an average low of 73°. 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 Lackland Air Force Base. See also: October | November | December.
