S
M
T
W
T
F
S
30
78°
60°
31
77°
63°
1
77°
63°
2
78°
62°
3
78°
62°
4
79°
64°
5
84°
63°
6
83°
64°
7
84°
63°
8
83°
62°
9
81°
61°
10
81°
62°
11
80°
62°
12
82°
61°
13
78°
60°
14
76°
60°
15
74°
59°
16
72°
59°
17
74°
58°
18
76°
58°
19
78°
57°
20
77°
57°
21
79°
56°
22
80°
52°
23
79°
51°
24
72°
56°
25
69°
53°
26
68°
55°
27
76°
54°
28
77°
55°
29
79°
54°
30
79°
53°
1
77°
50°
2
76°
52°
3
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Poolesville
Poolesville's September 2026 forecast shows daily high temperatures ranging from 68° to 84°, with overnight lows between 50° and 64°. The average high for September is 78° 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 Poolesville. See also: October | November | December.
