S
M
T
W
T
F
S
30
72°
49°
31
75°
51°
1
78°
46°
2
71°
47°
3
70°
48°
4
74°
55°
5
74°
55°
6
78°
48°
7
72°
52°
8
70°
53°
9
69°
53°
10
76°
52°
11
72°
52°
12
71°
53°
13
68°
49°
14
68°
45°
15
66°
44°
16
66°
43°
17
67°
50°
18
69°
49°
19
73°
50°
20
74°
51°
21
68°
45°
22
71°
47°
23
64°
48°
24
66°
42°
25
66°
40°
26
Hist. Avg.
66°
44°
27
Hist. Avg.
66°
44°
28
Hist. Avg.
66°
44°
29
Hist. Avg.
65°
43°
30
Hist. Avg.
65°
43°
1
Hist. Avg.
64°
43°
2
Hist. Avg.
64°
42°
3
Hist. Avg.
64°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Foster Brook
Foster Brook's September 2026 forecast shows daily high temperatures ranging from 64° to 78°, with overnight lows between 40° and 55°. The average high for September is 71° with an average low of 49°. 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 Foster Brook. See also: October | November | December.
