S
M
T
W
T
F
S
30
83°
69°
31
86°
69°
1
95°
72°
2
96°
74°
3
88°
74°
4
93°
74°
5
81°
70°
6
77°
63°
7
78°
59°
8
85°
61°
9
79°
71°
10
77°
59°
11
80°
56°
12
87°
61°
13
72°
53°
14
71°
50°
15
83°
66°
16
74°
65°
17
72°
60°
18
72°
66°
19
76°
61°
20
66°
60°
21
69°
59°
22
68°
55°
23
69°
54°
24
70°
53°
25
71°
53°
26
72°
54°
27
71°
55°
28
72°
55°
29
68°
47°
30
71°
54°
1
72°
53°
2
65°
52°
3
62°
52°
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 62° to 76°, with overnight lows between 47° and 66°. The average high for September is 70° with an average low of 56°. 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.
