S
M
T
W
T
F
S
30
83°
64°
31
84°
65°
1
84°
64°
2
86°
64°
3
87°
65°
4
87°
66°
5
84°
67°
6
82°
63°
7
83°
61°
8
85°
62°
9
85°
65°
10
86°
64°
11
86°
64°
12
85°
63°
13
85°
63°
14
84°
62°
15
84°
63°
16
85°
64°
17
Hist. Avg.
83°
63°
18
Hist. Avg.
82°
62°
19
Hist. Avg.
82°
62°
20
Hist. Avg.
82°
62°
21
Hist. Avg.
82°
61°
22
Hist. Avg.
81°
61°
23
Hist. Avg.
81°
60°
24
Hist. Avg.
81°
60°
25
Hist. Avg.
80°
60°
26
Hist. Avg.
80°
59°
27
Hist. Avg.
80°
59°
28
Hist. Avg.
79°
59°
29
Hist. Avg.
79°
58°
30
Hist. Avg.
79°
58°
1
Hist. Avg.
78°
57°
2
Hist. Avg.
78°
57°
3
Hist. Avg.
78°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Suwanee-Duluth
Suwanee-Duluth's September 2026 forecast shows daily high temperatures ranging from 82° to 87°, with overnight lows between 61° and 67°. The average high for September is 85° 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-Duluth. See also: October | November | December.
