S
M
T
W
T
F
S
30
102°
70°
31
102°
73°
1
102°
73°
2
100°
75°
3
99°
73°
4
100°
72°
5
102°
72°
6
104°
73°
7
102°
72°
8
104°
77°
9
102°
77°
10
82°
68°
11
93°
70°
12
95°
73°
13
93°
72°
14
97°
75°
15
99°
77°
16
99°
75°
17
97°
73°
18
97°
73°
19
95°
72°
20
95°
72°
21
82°
66°
22
84°
66°
23
88°
64°
24
86°
61°
25
88°
64°
26
73°
68°
27
84°
68°
28
88°
66°
29
88°
68°
30
91°
72°
1
77°
68°
2
75°
64°
3
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chelsea
Chelsea's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Chelsea. See also: October | November | December.
