S
M
T
W
T
F
S
30
59°
37°
31
58°
40°
1
59°
37°
2
58°
37°
3
63°
42°
4
61°
42°
5
59°
39°
6
59°
38°
7
Hist. Avg.
62°
60°
8
Hist. Avg.
63°
60°
9
Hist. Avg.
63°
60°
10
Hist. Avg.
63°
60°
11
Hist. Avg.
63°
60°
12
Hist. Avg.
63°
60°
13
Hist. Avg.
63°
60°
14
Hist. Avg.
63°
60°
15
Hist. Avg.
63°
60°
16
Hist. Avg.
63°
60°
17
Hist. Avg.
63°
60°
18
Hist. Avg.
63°
60°
19
Hist. Avg.
63°
61°
20
Hist. Avg.
64°
61°
21
Hist. Avg.
64°
61°
22
Hist. Avg.
64°
61°
23
Hist. Avg.
64°
61°
24
Hist. Avg.
64°
61°
25
Hist. Avg.
64°
61°
26
Hist. Avg.
64°
61°
27
Hist. Avg.
64°
61°
28
Hist. Avg.
64°
61°
29
Hist. Avg.
64°
61°
30
Hist. Avg.
64°
61°
1
Hist. Avg.
64°
61°
2
Hist. Avg.
65°
61°
3
Hist. Avg.
65°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mount Barker
Mount Barker's September 2026 forecast shows daily high temperatures ranging from 58° to 63°, with overnight lows between 37° and 42°. The average high for September is 60° with an average low of 39°. 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 Mount Barker. See also: October | November | December.
