S
M
T
W
T
F
S
30
66°
49°
31
65°
50°
1
68°
51°
2
69°
54°
3
69°
54°
4
68°
49°
5
67°
48°
6
65°
51°
7
68°
50°
8
68°
49°
9
67°
53°
10
68°
53°
11
68°
52°
12
67°
49°
13
65°
47°
14
63°
51°
15
62°
52°
16
63°
53°
17
64°
52°
18
66°
52°
19
63°
51°
20
65°
52°
21
67°
50°
22
65°
47°
23
60°
45°
24
60°
47°
25
61°
49°
26
63°
47°
27
62°
48°
28
59°
52°
29
62°
51°
30
62°
51°
1
63°
50°
2
64°
48°
3
59°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calne
Calne's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 44° and 54°. The average high for September is 65° 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 Calne. See also: October | November | December.