S
M
T
W
T
F
S
30
74°
63°
31
76°
63°
1
80°
62°
2
79°
60°
3
77°
56°
4
73°
55°
5
73°
56°
6
72°
56°
7
74°
55°
8
76°
57°
9
76°
59°
10
74°
38°
11
72°
54°
12
73°
53°
13
74°
54°
14
74°
55°
15
73°
54°
16
73°
53°
17
69°
53°
18
73°
52°
19
69°
53°
20
71°
53°
21
72°
54°
22
71°
54°
23
72°
51°
24
65°
50°
25
60°
46°
26
63°
49°
27
66°
49°
28
69°
50°
29
69°
50°
30
68°
49°
1
69°
50°
2
68°
50°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Acton
Acton's September 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 38° and 63°. The average high for September is 72° with an average low of 53°. 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 Acton. See also: October | November | December.
