S
M
T
W
T
F
S
30
73°
59°
31
74°
61°
1
78°
62°
2
76°
57°
3
78°
55°
4
73°
54°
5
72°
56°
6
76°
57°
7
76°
53°
8
73°
53°
9
72°
52°
10
73°
53°
11
71°
36°
12
72°
52°
13
73°
52°
14
66°
49°
15
67°
50°
16
72°
50°
17
71°
47°
18
63°
46°
19
65°
49°
20
71°
51°
21
71°
51°
22
72°
50°
23
72°
48°
24
70°
47°
25
69°
48°
26
69°
47°
27
70°
48°
28
69°
46°
29
67°
45°
30
61°
43°
1
60°
45°
2
66°
46°
3
67°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Selwyn
Selwyn's September 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 36° and 62°. The average high for September is 71° 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 Selwyn. See also: October | November | December.
