S
M
T
W
T
F
S
30
85°
65°
31
79°
67°
1
78°
67°
2
79°
69°
3
84°
69°
4
84°
68°
5
83°
68°
6
83°
67°
7
84°
67°
8
81°
64°
9
79°
61°
10
77°
60°
11
76°
62°
12
81°
59°
13
80°
66°
14
82°
61°
15
76°
59°
16
74°
61°
17
75°
60°
18
78°
63°
19
81°
61°
20
81°
64°
21
80°
64°
22
81°
59°
23
78°
57°
24
75°
57°
25
74°
56°
26
74°
62°
27
78°
61°
28
78°
62°
29
79°
60°
30
77°
55°
1
72°
61°
2
77°
61°
3
77°
59°
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 72° to 85°, with overnight lows between 55° and 69°. The average high for September is 79° 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 Gloucester. See also: October | November | December.
