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°
60°
8
83°
63°
9
86°
68°
10
91°
72°
11
82°
66°
12
81°
70°
13
84°
70°
14
85°
69°
15
87°
70°
16
84°
65°
17
79°
66°
18
77°
64°
19
75°
63°
20
78°
61°
21
82°
66°
22
80°
65°
23
75°
65°
24
75°
64°
25
76°
63°
26
79°
64°
27
79°
63°
28
78°
63°
29
78°
62°
30
77°
63°
1
77°
62°
2
76°
62°
3
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gloucester Courthouse
Gloucester Courthouse's September 2026 forecast shows daily high temperatures ranging from 75° to 91°, with overnight lows between 60° and 72°. The average high for September is 80° with an average low of 65°. 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 Courthouse. See also: October | November | December.