S
M
T
W
T
F
S
30
90°
71°
31
91°
73°
1
93°
71°
2
91°
72°
3
92°
71°
4
92°
74°
5
91°
72°
6
92°
74°
7
92°
72°
8
90°
74°
9
92°
72°
10
90°
73°
11
91°
72°
12
88°
72°
13
88°
71°
14
87°
72°
15
88°
72°
16
87°
71°
17
88°
71°
18
90°
70°
19
89°
71°
20
89°
70°
21
88°
70°
22
89°
69°
23
89°
70°
24
90°
70°
25
89°
69°
26
88°
67°
27
89°
68°
28
88°
68°
29
87°
67°
30
87°
67°
1
86°
65°
2
88°
67°
3
85°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Georgetown
Georgetown's September 2026 forecast shows daily high temperatures ranging from 85° to 93°, with overnight lows between 63° and 74°. The average high for September is 89° with an average low of 70°. 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 Georgetown. See also: October | November | December.
