S
M
T
W
T
F
S
30
89°
69°
31
89°
69°
1
88°
68°
2
89°
69°
3
89°
68°
4
85°
66°
5
85°
65°
6
87°
65°
7
88°
67°
8
89°
68°
9
89°
68°
10
88°
67°
11
89°
68°
12
88°
67°
13
88°
67°
14
86°
63°
15
88°
65°
16
87°
64°
17
88°
65°
18
87°
62°
19
86°
56°
20
79°
58°
21
79°
57°
22
80°
57°
23
81°
60°
24
84°
61°
25
84°
59°
26
79°
57°
27
77°
59°
28
81°
59°
29
79°
60°
30
82°
58°
1
82°
59°
2
81°
58°
3
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manchester
Manchester's September 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 56° and 69°. The average high for September is 85° with an average low of 63°. 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 Manchester. See also: October | November | December.