S
M
T
W
T
F
S
30
88°
70°
31
84°
70°
1
95°
72°
2
90°
73°
3
91°
70°
4
90°
70°
5
81°
70°
6
81°
61°
7
81°
61°
8
86°
55°
9
90°
64°
10
88°
70°
11
77°
68°
12
79°
66°
13
88°
72°
14
77°
63°
15
77°
52°
16
86°
59°
17
86°
68°
18
84°
70°
19
79°
63°
20
81°
68°
21
70°
63°
22
63°
57°
23
64°
54°
24
66°
50°
25
72°
48°
26
72°
55°
27
64°
59°
28
70°
61°
29
72°
59°
30
79°
55°
1
86°
59°
2
88°
58°
3
68°
58°
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 88°, with overnight lows between 58° and 58°. 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.
