S
M
T
W
T
F
S
30
82°
62°
31
84°
66°
1
87°
66°
2
88°
65°
3
87°
61°
4
86°
57°
5
80°
58°
6
80°
61°
7
84°
63°
8
84°
64°
9
85°
63°
10
80°
62°
11
85°
63°
12
84°
64°
13
84°
63°
14
83°
63°
15
85°
62°
16
85°
62°
17
83°
61°
18
82°
55°
19
81°
54°
20
77°
52°
21
74°
51°
22
74°
57°
23
76°
54°
24
80°
51°
25
73°
50°
26
74°
51°
27
73°
50°
28
78°
55°
29
77°
56°
30
79°
55°
1
76°
56°
2
76°
54°
3
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Southern Md Facility
Southern Md Facility's September 2026 forecast shows daily high temperatures ranging from 70° to 88°, with overnight lows between 50° and 66°. The average high for September is 80° with an average low of 58°. 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 Southern Md Facility. See also: October | November | December.