S
M
T
W
T
F
S
30
86°
70°
31
84°
74°
1
93°
75°
2
83°
73°
3
90°
74°
4
88°
72°
5
80°
71°
6
80°
69°
7
80°
67°
8
82°
64°
9
87°
70°
10
90°
74°
11
80°
71°
12
80°
72°
13
83°
71°
14
82°
64°
15
76°
67°
16
83°
67°
17
81°
68°
18
83°
65°
19
75°
58°
20
75°
63°
21
76°
61°
22
73°
63°
23
75°
52°
24
73°
66°
25
71°
60°
26
70°
61°
27
76°
66°
28
78°
65°
29
74°
62°
30
75°
65°
1
75°
64°
2
74°
62°
3
74°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Annapolis
Annapolis's September 2026 forecast shows daily high temperatures ranging from 70° to 90°, with overnight lows between 52° and 74°. The average high for September is 77° 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 Annapolis. See also: October | November | December.