S
M
T
W
T
F
S
30
91°
70°
31
93°
70°
1
96°
70°
2
98°
72°
3
97°
73°
4
97°
72°
5
100°
72°
6
97°
71°
7
80°
67°
8
87°
66°
9
86°
70°
10
86°
71°
11
87°
69°
12
85°
69°
13
88°
68°
14
87°
67°
15
86°
68°
16
84°
67°
17
84°
65°
18
85°
64°
19
84°
63°
20
81°
60°
21
85°
64°
22
84°
63°
23
84°
64°
24
83°
63°
25
83°
63°
26
82°
62°
27
84°
63°
28
83°
63°
29
82°
62°
30
82°
62°
1
81°
61°
2
80°
58°
3
74°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Suwanee
Suwanee's September 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 55° and 71°. The average high for September is 84° with an average low of 64°. 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 Suwanee. See also: October | November | December.
