S
M
T
W
T
F
S
30
83°
67°
31
84°
70°
1
87°
71°
2
88°
71°
3
88°
69°
4
85°
71°
5
86°
69°
6
83°
70°
7
81°
69°
8
80°
70°
9
85°
65°
10
84°
64°
11
79°
70°
12
84°
69°
13
85°
68°
14
80°
69°
15
85°
68°
16
84°
69°
17
Hist. Avg.
80°
64°
18
Hist. Avg.
80°
64°
19
Hist. Avg.
79°
64°
20
Hist. Avg.
79°
63°
21
Hist. Avg.
79°
63°
22
Hist. Avg.
78°
62°
23
Hist. Avg.
78°
62°
24
Hist. Avg.
78°
62°
25
Hist. Avg.
77°
61°
26
Hist. Avg.
77°
61°
27
Hist. Avg.
76°
60°
28
Hist. Avg.
76°
60°
29
Hist. Avg.
76°
60°
30
Hist. Avg.
75°
59°
1
Hist. Avg.
75°
59°
2
Hist. Avg.
74°
58°
3
Hist. Avg.
74°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Inner Harbor
Inner Harbor's September 2026 forecast shows daily high temperatures ranging from 79° to 88°, with overnight lows between 64° and 71°. The average high for September is 84° with an average low of 69°. 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 Inner Harbor. See also: October | November | December.
