S
M
T
W
T
F
S
30
81°
63°
31
82°
63°
1
81°
62°
2
78°
62°
3
79°
61°
4
79°
62°
5
81°
62°
6
81°
61°
7
82°
62°
8
83°
62°
9
80°
61°
10
75°
59°
11
80°
61°
12
81°
61°
13
81°
59°
14
70°
49°
15
68°
52°
16
69°
55°
17
70°
52°
18
68°
50°
19
71°
51°
20
75°
54°
21
76°
55°
22
74°
54°
23
75°
45°
24
68°
45°
25
68°
53°
26
72°
54°
27
72°
44°
28
71°
43°
29
64°
46°
30
66°
49°
1
65°
49°
2
68°
52°
3
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barrington
Barrington's September 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 43° and 63°. The average high for September is 74° with an average low of 55°. 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 Barrington. See also: October | November | December.
