S
M
T
W
T
F
S
30
75°
48°
31
82°
50°
1
69°
56°
2
64°
56°
3
62°
55°
4
65°
54°
5
72°
55°
6
64°
57°
7
73°
56°
8
82°
52°
9
87°
53°
10
82°
52°
11
72°
48°
12
65°
53°
13
63°
52°
14
72°
54°
15
68°
51°
16
81°
51°
17
83°
57°
18
74°
49°
19
77°
51°
20
81°
52°
21
73°
52°
22
75°
48°
23
74°
50°
24
73°
53°
25
73°
52°
26
72°
51°
27
70°
52°
28
70°
51°
29
72°
51°
30
72°
50°
1
71°
48°
2
66°
52°
3
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barlow
Barlow's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 47° and 53°. The average high for September is 73° with an average low of 51°. 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 Barlow. See also: October | November | December.