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
80°
55°
15
77°
59°
16
82°
65°
17
85°
67°
18
86°
67°
19
81°
69°
20
81°
69°
21
81°
70°
22
80°
67°
23
75°
62°
24
74°
62°
25
76°
61°
26
75°
62°
27
80°
65°
28
79°
63°
29
79°
64°
30
76°
62°
1
73°
63°
2
76°
64°
3
78°
61°
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 73° to 86°, with overnight lows between 55° and 70°. The average high for September is 79° with an average low of 64°. 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.
