S
M
T
W
T
F
S
30
95°
72°
31
96°
74°
1
97°
73°
2
99°
69°
3
100°
76°
4
89°
74°
5
95°
71°
6
94°
71°
7
97°
71°
8
97°
74°
9
96°
73°
10
95°
73°
11
97°
74°
12
96°
75°
13
95°
75°
14
93°
74°
15
93°
72°
16
93°
71°
17
92°
69°
18
91°
68°
19
91°
66°
20
90°
67°
21
88°
68°
22
89°
65°
23
86°
61°
24
79°
66°
25
87°
66°
26
86°
65°
27
83°
65°
28
81°
64°
29
86°
65°
30
86°
65°
1
85°
64°
2
84°
64°
3
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Kerrville
Kerrville's September 2026 forecast shows daily high temperatures ranging from 79° to 97°, with overnight lows between 61° and 75°. The average high for September is 89° 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 Kerrville. See also: October | November | December.