S
M
T
W
T
F
S
30
95°
76°
31
90°
79°
1
86°
80°
2
93°
81°
3
91°
81°
4
91°
79°
5
90°
79°
6
90°
79°
7
90°
79°
8
91°
79°
9
87°
77°
10
89°
75°
11
92°
78°
12
90°
78°
13
91°
80°
14
91°
76°
15
92°
75°
16
90°
74°
17
89°
75°
18
89°
72°
19
87°
70°
20
86°
70°
21
89°
69°
22
90°
69°
23
90°
73°
24
89°
73°
25
89°
72°
26
88°
71°
27
84°
72°
28
86°
72°
29
86°
71°
30
89°
72°
1
88°
71°
2
86°
71°
3
86°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barrett
Barrett's September 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 69° and 80°. The average high for September is 89° with an average low of 73°. 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 Barrett. See also: October | November | December.
