S
M
T
W
T
F
S
30
70°
51°
31
70°
50°
1
71°
53°
2
71°
57°
3
72°
59°
4
78°
60°
5
79°
58°
6
78°
51°
7
77°
50°
8
70°
51°
9
70°
50°
10
69°
52°
11
68°
55°
12
68°
51°
13
70°
53°
14
73°
54°
15
73°
54°
16
67°
55°
17
68°
53°
18
71°
52°
19
72°
46°
20
70°
49°
21
70°
47°
22
72°
45°
23
65°
45°
24
64°
46°
25
64°
46°
26
65°
44°
27
63°
43°
28
63°
45°
29
61°
42°
30
62°
42°
1
62°
47°
2
68°
42°
3
66°
46°
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 61° to 79°, with overnight lows between 42° and 60°. The average high for September is 69° with an average low of 50°. 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.
