S
M
T
W
T
F
S
30
75°
68°
31
83°
71°
1
89°
74°
2
95°
73°
3
85°
68°
4
76°
68°
5
79°
63°
6
78°
60°
7
78°
59°
8
80°
60°
9
80°
69°
10
81°
61°
11
78°
62°
12
83°
65°
13
81°
57°
14
73°
63°
15
88°
67°
16
76°
64°
17
73°
58°
18
73°
56°
19
69°
53°
20
70°
52°
21
70°
54°
22
72°
53°
23
74°
58°
24
72°
52°
25
66°
57°
26
75°
57°
27
75°
56°
28
74°
56°
29
71°
55°
30
73°
56°
1
73°
54°
2
67°
54°
3
70°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Southgate
Southgate's September 2026 forecast shows daily high temperatures ranging from 66° to 88°, with overnight lows between 52° and 67°. The average high for September is 74° with an average low of 57°. 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 Southgate. See also: October | November | December.