S
M
T
W
T
F
S
30
68°
50°
31
67°
49°
1
69°
50°
2
70°
53°
3
71°
53°
4
70°
48°
5
68°
47°
6
66°
50°
7
69°
50°
8
70°
48°
9
70°
52°
10
69°
52°
11
70°
53°
12
69°
49°
13
67°
45°
14
65°
50°
15
64°
51°
16
63°
52°
17
64°
51°
18
67°
51°
19
66°
50°
20
66°
51°
21
68°
48°
22
67°
45°
23
62°
44°
24
61°
45°
25
62°
45°
26
64°
47°
27
63°
46°
28
60°
50°
29
63°
49°
30
63°
48°
1
64°
49°
2
65°
48°
3
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Barnwell
Barnwell's September 2026 forecast shows daily high temperatures ranging from 60° to 71°, with overnight lows between 44° and 53°. The average high for September is 66° with an average low of 49°. 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 Barnwell. See also: October | November | December.
