S
M
T
W
T
F
S
30
89°
66°
31
88°
74°
1
94°
71°
2
87°
74°
3
93°
73°
4
93°
75°
5
87°
72°
6
82°
72°
7
81°
64°
8
85°
62°
9
87°
66°
10
93°
73°
11
82°
74°
12
80°
74°
13
86°
73°
14
83°
71°
15
77°
62°
16
81°
60°
17
88°
65°
18
87°
71°
19
82°
67°
20
85°
69°
21
77°
66°
22
75°
63°
23
71°
62°
24
69°
60°
25
69°
58°
26
70°
59°
27
72°
57°
28
68°
56°
29
70°
56°
30
74°
55°
1
69°
58°
2
71°
56°
3
74°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gloucester
Gloucester's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 55° and 69°. The average high for September is 73° with an average low of 60°. 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 Gloucester. See also: October | November | December.
