S
M
T
W
T
F
S
30
91°
77°
31
90°
77°
1
86°
76°
2
91°
78°
3
89°
81°
4
90°
79°
5
90°
78°
6
90°
77°
7
91°
76°
8
92°
77°
9
91°
76°
10
93°
78°
11
92°
77°
12
91°
78°
13
92°
76°
14
91°
77°
15
87°
79°
16
87°
78°
17
89°
79°
18
89°
79°
19
90°
78°
20
89°
79°
21
88°
78°
22
88°
77°
23
86°
76°
24
86°
75°
25
87°
78°
26
89°
77°
27
88°
78°
28
88°
78°
29
87°
77°
30
87°
78°
1
88°
78°
2
87°
77°
3
86°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in South Middle River
South Middle River's September 2026 forecast shows daily high temperatures ranging from 86° to 93°, with overnight lows between 75° and 81°. The average high for September is 89° with an average low of 78°. 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 South Middle River. See also: October | November | December.
