S
M
T
W
T
F
S
30
68°
57°
31
73°
55°
1
72°
48°
2
68°
60°
3
75°
64°
4
72°
55°
5
70°
53°
6
75°
54°
7
72°
61°
8
64°
55°
9
66°
50°
10
66°
46°
11
72°
46°
12
70°
62°
13
72°
61°
14
73°
60°
15
71°
49°
16
67°
51°
17
67°
51°
18
66°
52°
19
66°
51°
20
65°
53°
21
66°
52°
22
68°
51°
23
67°
50°
24
68°
50°
25
64°
50°
26
63°
49°
27
66°
52°
28
65°
46°
29
60°
44°
30
59°
44°
1
60°
50°
2
63°
50°
3
64°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Christchurch
Christchurch's September 2026 forecast shows daily high temperatures ranging from 59° to 73°, with overnight lows between 44° and 62°. The average high for September is 66° with an average low of 51°. 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 Christchurch. See also: October | November | December.
