S
M
T
W
T
F
S
30
91°
71°
31
86°
76°
1
97°
76°
2
82°
72°
3
91°
74°
4
90°
72°
5
84°
72°
6
84°
68°
7
84°
64°
8
87°
64°
9
93°
69°
10
91°
76°
11
82°
70°
12
83°
68°
13
89°
73°
14
81°
65°
15
79°
59°
16
86°
64°
17
86°
69°
18
86°
62°
19
75°
67°
20
82°
66°
21
73°
63°
22
66°
57°
23
66°
63°
24
70°
62°
25
74°
61°
26
76°
58°
27
73°
58°
28
75°
57°
29
75°
60°
30
79°
61°
1
78°
59°
2
78°
64°
3
71°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Baltimore
Baltimore's September 2026 forecast shows daily high temperatures ranging from 66° to 86°, with overnight lows between 57° and 67°. The average high for September is 75° with an average low of 61°. 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 Baltimore. See also: October | November | December.
