S
M
T
W
T
F
S
30
65°
57°
31
61°
56°
1
62°
55°
2
60°
55°
3
60°
53°
4
61°
54°
5
60°
57°
6
62°
58°
7
63°
57°
8
62°
57°
9
64°
56°
10
64°
56°
11
61°
55°
12
58°
56°
13
58°
56°
14
59°
53°
15
59°
54°
16
60°
55°
17
60°
51°
18
59°
51°
19
58°
52°
20
57°
51°
21
57°
53°
22
58°
56°
23
61°
55°
24
62°
53°
25
57°
49°
26
59°
50°
27
58°
51°
28
56°
50°
29
59°
51°
30
60°
49°
1
56°
48°
2
56°
48°
3
55°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Clachan
Clachan's September 2026 forecast shows daily high temperatures ranging from 55° to 65°, with overnight lows between 48° and 58°. The average high for September is 60° with an average low of 53°. 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 Clachan. See also: October | November | December.