S
M
T
W
T
F
S
30
99°
68°
31
100°
66°
1
100°
68°
2
99°
70°
3
99°
69°
4
98°
70°
5
98°
70°
6
97°
64°
7
99°
63°
8
89°
65°
9
88°
67°
10
93°
68°
11
94°
67°
12
96°
68°
13
97°
60°
14
96°
57°
15
91°
57°
16
84°
58°
17
85°
60°
18
87°
59°
19
85°
57°
20
84°
56°
21
84°
57°
22
85°
58°
23
89°
63°
24
89°
63°
25
90°
62°
26
90°
63°
27
91°
61°
28
88°
59°
29
87°
60°
30
87°
59°
1
85°
58°
2
87°
60°
3
80°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wellington
Wellington's September 2026 forecast shows daily high temperatures ranging from 80° to 100°, with overnight lows between 51° and 70°. The average high for September is 91° with an average low of 62°. 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 Wellington. See also: October | November | December.
