S
M
T
W
T
F
S
30
63°
50°
31
73°
43°
1
73°
46°
2
77°
41°
3
79°
43°
4
82°
37°
5
84°
41°
6
66°
53°
7
65°
50°
8
65°
46°
9
67°
44°
10
69°
48°
11
67°
44°
12
61°
43°
13
56°
42°
14
57°
41°
15
58°
44°
16
59°
45°
17
58°
44°
18
60°
43°
19
56°
32°
20
49°
32°
21
60°
37°
22
56°
36°
23
55°
36°
24
55°
35°
25
52°
32°
26
52°
32°
27
56°
36°
28
51°
32°
29
50°
25°
30
42°
22°
1
43°
22°
2
43°
21°
3
44°
23°
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 42° to 69°, with overnight lows between 21° and 53°. The average high for September is 56° with an average low of 37°. 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.
