S
M
T
W
T
F
S
30
87°
69°
31
88°
69°
1
96°
73°
2
90°
73°
3
95°
72°
4
94°
72°
5
85°
63°
6
83°
64°
7
84°
63°
8
82°
62°
9
80°
66°
10
82°
65°
11
85°
64°
12
82°
62°
13
83°
61°
14
81°
62°
15
77°
66°
16
75°
65°
17
74°
61°
18
74°
57°
19
73°
57°
20
73°
60°
21
76°
60°
22
79°
63°
23
81°
64°
24
81°
63°
25
79°
62°
26
78°
61°
27
77°
62°
28
78°
62°
29
79°
61°
30
74°
59°
1
70°
55°
2
72°
59°
3
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Potomac Mills
Potomac Mills's September 2026 forecast shows daily high temperatures ranging from 70° to 96°, with overnight lows between 55° and 73°. The average high for September is 80° with an average low of 63°. 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 Potomac Mills. See also: October | November | December.
