S
M
T
W
T
F
S
30
74°
50°
31
73°
50°
1
72°
49°
2
71°
51°
3
72°
52°
4
70°
53°
5
71°
51°
6
72°
50°
7
69°
49°
8
70°
48°
9
69°
48°
10
70°
54°
11
69°
48°
12
70°
47°
13
73°
46°
14
72°
52°
15
72°
51°
16
69°
46°
17
67°
45°
18
69°
45°
19
70°
52°
20
71°
52°
21
73°
51°
22
69°
50°
23
72°
48°
24
70°
46°
25
68°
49°
26
64°
42°
27
70°
42°
28
62°
41°
29
61°
42°
30
64°
45°
1
64°
41°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
64°
40°
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 61° to 74°, with overnight lows between 41° and 54°. The average high for September is 69° with an average low of 48°. 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.
