S
M
T
W
T
F
S
30
67°
52°
31
67°
52°
1
68°
53°
2
68°
52°
3
67°
50°
4
66°
50°
5
66°
53°
6
67°
48°
7
68°
52°
8
68°
51°
9
69°
52°
10
69°
50°
11
65°
52°
12
67°
47°
13
69°
51°
14
68°
50°
15
68°
45°
16
64°
48°
17
66°
46°
18
67°
47°
19
67°
51°
20
66°
52°
21
67°
51°
22
67°
51°
23
65°
50°
24
64°
49°
25
64°
50°
26
63°
48°
27
65°
49°
28
63°
48°
29
65°
47°
30
63°
47°
1
Hist. Avg.
60°
47°
2
Hist. Avg.
60°
47°
3
Hist. Avg.
59°
47°
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 63° to 69°, with overnight lows between 45° and 53°. The average high for September is 66° with an average low of 50°. 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.
